Two questions
3. a sphere has a diameter of 12 cm.
a. find the surface area of the sphere in exact form. (4 points)
b. find the volume of the sphere in exact form. (4 points)
c. what is the ratio of the surface area to the volume in lowest terms. (4 points)

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Find the slope of the line passing through a pair of points

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text