Friendly numbers to find answer for 43 - 19

My teacher wants me to find the volume of a cylinder wich the hight is 13 ft and radius is 5ft

Ama Maria walks 9 miles in 3 hours. How many miles does she walk per hour?

If n is divided by 7, the remainder is 5. Which of the following could NOT be the value of 2n? a. 24 b. 52 c. 66 d. 86 e. 108

A helicopter's altitude dropped 275 feet each minute for 5 consecutive minutes. What is the change in the helicopter's altitude over this time period? and abbreviation

A rectangle measures by 3 cm by 4 cm. a rectangle similar to the first measures 12 cm by 16 cm. find the ratio of the areas of rectangles. how does that ratio compare with the ratio of the side lengths?

Your class is conducting an experiment to study geometric sequences. The class forms a line. The first person takes a whole pizza, divides it in half, keeps half, and hands the other half to the next person.

A speed reader can read 850 words per minute. An average reader can read 1/7 that speed. how many words per minute does an average reader read?

A wave with a frequency of 24Hz has a wavelength of 6 meters. At what speed will this wave travel?

A store allows customers to fill their own bags of candy. glen decides he only wants caramels and candy corn. caramels sell for $0.95 per pound, and candy corn sells for $0.79 per pound. glens bag weights 1.7 pounds and it costs $1.48.

6,651,297,000 in verbal form rounded to the nearest hundred million