Estimate the sum. use benchmarks with decimal parts of 0, 0.25, 0.50, or 0.75.
2.52+4.03
a. 6.50
b. 6.75
c. 7

Asphere has a diameter of 10 in. what is the volume of the sphere?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

How can (square root of 25) ^2 be rewritten?