If the sphere shown above has a radius of 20 units, then what is the approximate volume of the sphere? (use 3.14 forpi .)
a. 41,866.67 cubic units
b. 16,746.67 cubic units
c. 33,493.33 cubic units
d. 628 cubic units

How do i work this problem out using the equation a=pe^rt

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.