Whe she was in year 8, sarah could run 800 metres in 3 minutes and 20 seconds. Three years later, when she was in year 11, she could run 800 metres in 2 minutes and 44 seconds. Find the percentage improvement in her time.

How do I calculate 4^7?

Robin has some bananas. 6 bananas are ripe. three fifths of he bananas are ripe. how many bananas does robin have in all

Mr. White needs at least 36 baseballs for his gym class. he has 14 baseballs ready. he Needs to buy more baseballs and they come in packages of six. Which inequality can be used to find how many packages of baseballs, P, mr.

Izzy is Iago's little sister. She is counting her coins. Izzy finds that she has three more quarters ($0.25) than she has dimes ($0.10), twice as many nickels ($0.05) as she has dimes, and four times as many pennies ($0.01) as she has dimes.

What is the diameter of the smallest circle that would enclose 2,000 pennies? Recall your model's equation: y=1.11x^{2}

How old am I? 16 17 4

A model builder has 30 pieces of balsa wood in a box. Four pieces are 15 inches long, 10 pieces are 12 inches long, and the rest are 8 inches long. What is the probability the builder will pull an 8-inch piece from the box without looking?

What is the greatest common factor of 84 and 96

0.25k+1.5-k-3.5 simplify expression

Identify at least one potential source of bias in the claim below. Explain why the bias would or would not affect a reader's view of the claim.