Harold bought 3 pounds of red apples and 4.2 pounds of green apples from blue star grocery, where both kinds of apples are $1.75 a pound. how much did harold spent on apples?

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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