A calcium ion has 20 protons and 18 electrons. Each proton has a + 1 charge and each electron has a - 1 charge. What is the charge of the calcium ion?

The ratio of girls to boys who participated in t he Geography Bee was 5 to 4 there were 36 total students how many were boys

Find 66 2/3 precent of 87. Find 1 precent of 3,620 62 1/2 precent of x is 5 what is x. 300 precent of k is 42 what is k

K (x) = x - 2 h (x) = x2 + 1 (h + k) (2) =

Two angles are complementary. One angle is 57o. What is the other angle?

CDs are on sale for $5 each. Jennifer has $45 and wants to buy as many as she can. How many CDs can Jennifer buy?

In a parking lot, 1 out of every 8 cars are blue. what percent of the cars in this lot are blue

Write 48 ten thousands, 21 hundreds, and 7 tens in word form and expanded form.

Slope of 2 and passes through (-5,1)

A flower bed in the shape of a triangle with one side twice the length of the shortest side and the third side is 24 feet more than the length of the shortest side find the demons ions if the perimeter is 128 feet

Select the best answer for the question. 2. Lavina wants to buy a rocking chair for $160. She'll pay 10% down and pay the rest in six monthly installments. What will be the amount of each monthly payment? A. $16 B. $26 C. $27 D. $24