Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

The value of a machine is shs. 415,000. The machine depreciates at a rate of 15% p.a. Find how many years it will take for...

The value of a machine is shs. 415,000. The machine depreciates at a rate of 15% p.a. Find how many years it will take for the value of the machine to be half of the original value.

Answers

Kavungya answered the question on March 27, 2019 at 12:40

Answer Attachments

Next: The volume of a gas at 30⁰C and 780mmHg is 400cm³. What will be its volume at 50⁰C at 600mmHg.

Previous: Using the trapezium rule, estimate the area bounded by the curve y = x², the x – axis and the co-ordinates x = 2 and...

View more Mathematics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

Use tables to evaluate (Solved)

Use tables to evaluate

Date posted: March 27, 2019 . Answers (1)
Two matatus on a dual carriageway are moving towards a bus stop and are on level 5 km from the stop. One is travelling 20... (Solved)

Two matatus on a dual carriageway are moving towards a bus stop and are on level 5 km from the stop. One is travelling 20 km/hr faster than the other, and arrives 30 seconds earlier. Calculate their speeds.

Date posted: March 27, 2019 . Answers (1)
Two points A and B are 1000m apart on level ground, a fixed distance from the foot of a hill. If the angles of elevation... (Solved)

Two points A and B are 1000m apart on level ground, a fixed distance from the foot of a hill. If the angles of elevation of the hill top from A and B are 60^o and 30^o respectively, find the height of the hill.

Date posted: March 27, 2019 . Answers (1)
Use the table reciprocals to evaluate to 3 s.f. 1/7 + 3/12 + 7/0.103 (Solved)

Use the table reciprocals to evaluate to 3 s.f.
1/7 + 3/12 + 7/0.103

Date posted: March 27, 2019 . Answers (1)
Three points are such that A (4 , 8), B(8,7), C (16, 5). Show that the three points are collinear. (Solved)

Three points are such that A (4 , 8), B(8,7), C (16, 5). Show that the three points are collinear.

Date posted: March 27, 2019 . Answers (1)
Rationalise the denominator in (Solved)

Rationalise the denominator in

Date posted: March 27, 2019 . Answers (1)
Expand (x + y)⁶ hence evaluate (1.02)⁶ to 3d.p. (Solved)

Expand (x + y)⁶ hence evaluate (1.02)⁶ to 3d.p.

Date posted: March 27, 2019 . Answers (1)
A man is employed at a KShs. 4000 salary and a 10% annual increment. Find the total amount of money received in the first five... (Solved)

A man is employed at a KShs. 4000 salary and a 10% annual increment. Find the total amount of money received in the first five years

Date posted: March 27, 2019 . Answers (1)
Without using tables, simplify (Solved)

Without using tables, simplify

Date posted: March 27, 2019 . Answers (1)
A train is moving towards a town with a velocity of 10 m/s. It gains speed and the velocity becomes 34 m/s after 10 minutes... (Solved)

A train is moving towards a town with a velocity of 10 m/s. It gains speed and the velocity becomes 34 m/s after 10 minutes . Find its acceleration

Date posted: March 27, 2019 . Answers (1)
An equation of a circle is given by x² + y² – 6x + 8y – 11 = 0 Find its centre and radius (Solved)

An equation of a circle is given by x² + y² – 6x + 8y – 11 = 0
Find its centre and radius

Date posted: March 27, 2019 . Answers (1)
A regular octagon has sides of 8 cm. Calculate its area to 3 s.f. (Solved)

A regular octagon has sides of 8 cm. Calculate its area to 3 s.f.

Date posted: March 27, 2019 . Answers (1)
A metal rod, cylindrical in shape has a radius of 4 cm and length of 14 cm. It is melted down and recast into small... (Solved)

A metal rod, cylindrical in shape has a radius of 4 cm and length of 14 cm. It is melted down and recast into small cubes of 2 cm length. Find how many such cubes are obtained

Date posted: March 27, 2019 . Answers (1)
A rectangle measures 3.6 cm by 2.8 cm. Find the percentage error in calculating its perimeter. (Solved)

A rectangle measures 3.6 cm by 2.8 cm. Find the percentage error in calculating its perimeter.

Date posted: March 27, 2019 . Answers (1)
A quantity P varies inversely as Q² Given that P = 4 When Q = 2. , write the equation joining P and Q hence find... (Solved)

A quantity P varies inversely as Q² Given that P = 4 When Q = 2. , write the equation joining P and Q
hence find P when Q = 4

Date posted: March 27, 2019 . Answers (1)
Find the value of ? within ? < ? < 360O if Cos (2 ? + 120) = 3/2 (Solved)

Find the value of θ within θ < θ < 360O if Cos (2 θ + 120) = 3/2

Date posted: March 27, 2019 . Answers (1)
A glass of juice of 200 ml content is such that the ratio of undiluted juice to water is 1: 7 Find how many diluted... (Solved)

A glass of juice of 200 ml content is such that the ratio of undiluted juice to water is 1: 7 Find how many diluted glasses can be made from a container with 3 litres undiluted juice

Date posted: March 27, 2019 . Answers (1)
The cost of 3 plates and 4 cups is Shs. 380. 4 plates and 5 cups cost Shs. 110 more than this. Find the cost... (Solved)

The cost of 3 plates and 4 cups is Shs. 380. 4 plates and 5 cups cost Shs. 110 more than this. Find the cost of each item.

Date posted: March 27, 2019 . Answers (1)
Shs. 6000 is deposited at compound interest rate of 13%. The same amount is deposited at 15% simple interest. Find which amount is more and... (Solved)

Shs. 6000 is deposited at compound interest rate of 13%. The same amount is deposited at 15% simple interest. Find which amount is more and by how much after 2 years in the bank.

Date posted: March 27, 2019 . Answers (1)
Solve for x by completing the square (Solved)

Solve for x by completing the square
2x² - 5x + 1 = 0

Date posted: March 27, 2019 . Answers (1)