Find the surface area of the sphere with the given dimension. Leave your answer in terms of pi

radius of 40 m

a. 6400 pi m^2

b. 4800 pi m^2

c. 3200 pi m^2

d. 1600 pi m^2

Simplify the expression (-1 - 3i) (-6 - i)

Solve for the quadratic equation x^2+9x=-18

Jeremiah rounded a number 8.7 what could the original number have been

The average attendance at a theater show each day is 3,000 when the number is rounded to the nearest thousand. The attendance is 2,700 when rounded to the nearest hundred. Which could be the actual daily attendance at the show? A. 2,478 B. 2,595 C.

Given the age in years, t, of a water-transport pipe, the formula R = 17 + 4 t can be used to predict the rate of water leakage (in gallons per minute) from the pipe as it carries water from the headquarters of a farming cooperative to farmland a

What is 4x 3y=19,6x-5y=-57?

In the equivalent ratio below what did we multiply by to get the ratio 9:4 45:20

Write the decimal 2.91 as a fraction or mixed number,

Workout 2/5 of 16 miles

A book has 500 pages numbered 1, 2, 3 and so on. How may times does the digit 1 appear in the page number?