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State two major roles of the kidney.
Date posted:
November 12, 2019
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Why is a pyramid of biomass a more accurate way of representing the amount of organic matter present in each trophic level as compared to the pyramid of numbers?
Date posted:
November 12, 2019
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The diagram below represents a section through a chloroplast as seen under the electron microscope.
(a) Name the structure labelled D.
(b) In which labelled structure do we find chlorophyll molecule.
(c) Name the structure labelled, where carbon IV oxide fixation occurs.
Date posted:
November 12, 2019
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The figure below shows a frustum of a square based pyramid (not drawn to scale). The base ABCD is a square of sides 10cm. The top A’B’C’D’ is a square of side 4 cm and each slant edges of the frustum is 5cm long. Calculate the angle between AC’ and the line AC.
Date posted:
November 12, 2019
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Draw a line DF = 4.6cm.Construct the locus of point K above DF such that angle DKF = 700.
Date posted:
November 12, 2019
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Triangle ABC has vertices A(1,0), B(4,0) and C(1,4) is mapped onto A’B’C’ under a shear matrix, x axis invariant and C(1,4) is mapped onto C’(7,4). Find the shear matrix hence find the coordinates of the image of P(2,-3) and Q(-2,-3).
Date posted:
November 12, 2019
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Explain why movement of air molecules is not energy driven process.
Date posted:
November 12, 2019
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Calculate all the values of x between -180° and +180° which satisfy the equation 6 cos (x − 30)° = −3.
Date posted:
November 12, 2019
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State two precautionary measures which should be taken in preventing the spread of HIV.
Date posted:
November 12, 2019
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The cost of a matatu was sh. 950 000.It depreciated in value by 5% per year for the first 2 years and 15% per for the subsequent years. Calculate the value of the matatu after 5 years.
Date posted:
November 12, 2019
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Given that P varies directly as V and inversely as the cube root of R and that P = 12 when V = 3 and R = 2,
(i) Find an equation connecting P, V and R.
(ii) Find the percentage change in P if V is increased by 12% and R decreased by 36%
Date posted:
November 12, 2019
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The radius and height of a cylindrical Kentank rounded to 1 cm are 105 cm and 300 cm respectively.
Calculate the percentage error in its volume.
Date posted:
November 12, 2019
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The figure below shows change in dry mass of germinating bean seeds with time.
Account for the;
(i) Decline in dry mass between A and B.
(ii) Rapid increase in dry mass between C and D.
Date posted:
November 12, 2019
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Given that 
and that a and b are rational numbers, find the values of a and b.
Date posted:
November 12, 2019
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Use the method of completing the square to solve
4 − 9x − 3x2 = 0
Date posted:
November 12, 2019
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Solve for x in log3 
= log5 0.5.
Date posted:
November 12, 2019
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The diagram below represents a cell organelle as seen under electron microscope.
(i) Identify the organelle.
(ii) State the function of the organelle named in (i) above in the cell.
(iii) State one visible adaptation that makes it suitable to perform its function.
(iv) Name one cell that has a large number of the organelle named in (i) above.
Date posted:
November 12, 2019
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(a) Expand and simplify (x − 1/2x)6 up to the term in x3 and state the constant term.
(b) Use this expansion to calculate to 4 d.p the value of (0.96)6.
Date posted:
November 12, 2019
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State the structural differences between the xylem and phloem.
Date posted:
November 12, 2019
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Make h the subject of the formula.
Date posted:
November 12, 2019
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In this question, show all the steps in your calculations, giving the answer at each stage. Use logarithms correct to decimal places, to evaluate.
Date posted:
November 12, 2019
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The speed of projectile v m/s at a given time t is given by v=10(10t-t2) calculate
a. The time when the velocity is maximum
b. The maximum velocity attained
c. The distance traveled by the body in the first 6 seconds
d. The acceleration of the projectile at t=6.5sec
Date posted:
November 12, 2019
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(a) Complete the table below for the function y = 2x2 + 3x – 5.
(b) On the grid provided draw the graph of y = 2x2 + 3x – 5 for -4 = x = 2
(c) Use your graph to state the roots of
(i) 2x2 + 3x – 5 = 0
(ii) 2x2 + 6x – 2 = 0
Date posted:
November 12, 2019
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Four towns A, B, C and D are such that B is 84km direct to the north of A and C is on a bearing of N 65oW from A at a distance of 60km. D is on a bearing of 340o from C at a distance of 30km. Using a scale of 1 cm rep 10km
a) Make an accurate scale drawing showing the relative positions of the towns
b) Find the distance and bearing of B from C
c) Find the distance and bearing of D from B
d) Find the bearing of A from D
Date posted:
November 12, 2019
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The figure above shows two circles ABPQ and ABSR intersecting at A and B. QART, PBS and ABU are straight lines. The line TSU is a tangent to the circle ABSR at S. Given that ˂BPQ = 80o, ˂PBU = 115o and ˂BUS = 70o.
Find & state reasons for the following angles
a) ˂BRS
b) ˂BSU
c) ˂STR
d) ˂BAR
e) ˂ARB
Date posted:
November 12, 2019
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Describe the process of digestion in the following sections in the alimentary canal of a none ruminant.
i. Mouth
ii. Stomach
iii. Small intestine
iv. Caecum
Date posted:
November 12, 2019
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(a). The price of an article is marked as sh.12,000. Mr. Mulmulwas sold the article at a discount of 10% and still made a profit of 5%. Calculate the cost of the article.
(b). Mr. Mulmulwas made a loss of 30% by selling an electric kettle at sh.700. What profit would he have made if she had sold it at sh.1150?
(c). Mr. Mulmulwas is a real estate agent who is entitled to a commission on all properties bought through him. During a certain month he sold 2 mansions at sh. 2.54 million each, 4 flats at sh. 582,000 each and 5 bungalows at sh.354,000 each and he was paid a total commission of sh.458,900. Calculate the percentage rate of commission he was paid.
Date posted:
November 12, 2019
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Given A 
find AB.
Date posted:
November 12, 2019
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Matrices P and Q are given by P = (3 1 2)and Q = (1 2 -1) Find the product PQ.
Date posted:
November 12, 2019
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Find all the integral values of x which satisfy the inequalities
20 − x > 5 + 2 x ≥ x + 5
Date posted:
November 12, 2019