Mathematics, 03.06.2020 20:59, am2016832

When she was in year 8,Sarah could run 800 meters in 3 minutes and 20 seconds. Three years later, when she was in year 11, she could run 800 meters in 2 minutes and 40 seconds.

Find the percentage improvement in her time and show your working out.

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 17:00, charitysamuels

Can someone pls ! pls answer all. no explanation needed..

Answers: 1

continue

Mathematics, 22.06.2019 00:30, zapata12

Parallelogram rstu is a rhombus. m∠r = 120° what is m∠t = 120 (what is m∠rsu? )

Answers: 2

continue

Mathematics, 22.06.2019 04:10, fitzghost

The graph represents this system of equations: 2x + y = 3 2x - 5y = 15 what is the solution to the system of equations represented by the graph? (0, -3) (1,1) (1.5,0) (2.5, -2)

Answers: 1

continue

Mathematics, 22.06.2019 04:30, orlando19882000

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean

Answers: 2

continue

Do you know the correct answer?

When she was in year 8,Sarah could run 800 meters in 3 minutes and 20 seconds. Three years later, w...