Gary saves $2.50 each day. which equation describes the relationship between the number of days (d) gary saves money and the total amount of money (m), in dollars, that he saves?

a. m equals 2.50d

b. m equals d minus 2.50

c. d equals 2.50m

d. d equals 2.50 divided by m

i dont understand it at all

What is the approximate circumference of the circle shown below?

The surface area of the triangular prism is .

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point