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 price of a car has been reduced from $10,500 to $6,300. What is the percentage decrease of the price of the car? A. 40% B. 60% C. 42% D. 4%

How many litres of pure antifreeze should be added to 5 litres of 30% antifreeze solution to create a 65% antifreeze solution?

0+47=47 use what property of math

Which equation can be used to calculate the area of the shaded triangle in the figure below? A rectangle is shown with a width of 6 ft and a length of 16 ft. There is a diagonal line through the rectangle, and the bottom half is shaded in grey.

What does x + y = 0 / x - y + 2 = 0

The storm drains were [Select] with leaves and branches.

Heather drove 10 miles in 22 minutes which is the simplest form of 10/22

There are 232 people waiting in line for an amusement park ride. Each car on the ride will be filled with 5 people. How many cars are needed to hold all the people waiting in line? TRY IT

Write in its simplest form, the ratio 3.5kilograms:800grams

Mountain trail is 844 length in feet lake trail 792 in feet harmony trail 528 how many feet longer is mountain trail than harmony trail