Calculate the time it would take for a $70000 investment to earn $1400 of simple interest at a rate of 4% per annum

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Asquare parking lot has 6,400 square meters what is the length in meters

The measure of an angle is 117°. what is the measure of a supplementary angle?