Farrah has 150 dimes, 250 nickels, and 400 pennies. Complete the table to show the ratio of the number of pennies to the total number of coins.

1:2

Step-by-step explanation:

In total, there are 800 coins. 400 of those coins are pennies. The ratio is 400 pennies to 800 coins. Since 400 is half of 800, this can be simplified down to 1 penny to 2 coins, or 1:2.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3