The cost is $3 plus $1 for each 15 minutes you use the computer. Melanie rented time on a computer for 2 hours. How much did it cost to her ?

(40 points) i need some . an answer definition is appreciated as well.

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Which point is a solution to y s 4x + 5?