michael started a savings account and after 3 weeks, he had $500 dollars, and after 7 weeks, he had $900. What is the rate of change of money in his savings account per week?

Fiona, Peter and Angad share some sweets in the ratio 4:5:1. Fiona gets 40 sweets. How many sweets are there altogether?

1kg of apples costs £2.40. How much do 2 1/2kg of apples cost?

What is the volume? 3 yd 10 yd 5 yd

Bob deposits $5000 into an account that pays simple interest at a rate of 4% per year. How much interest will he be paid in the first 6 years?

A turtle is at the bottom of a 20 foot well. Each day it crawls up 4 feet but it slips back 2 feet. After how many days will the turtle reach the top of the well?

On a map 1 inch equals 18.4 miles. If two cities are 4.5 inches apart on the map, how far are they actually apart?

What is 66 tens-30 tens

A measuring cup holds 250 mL. How many times must the measuring cup be filled to measure 1 L of water?

What is y in the equation 14-6y=44

The period T (in seconds) of a pendulum is given by T=2/pi / sqrt ((L) / (32)), where L stands for the length (in feet) of the pendulum. If / pi = 3.14, and the period is 1.57 seconds, what is the length?