An airplane’s altitude changed –378 feet over 7 minutes. What was the mean change of altitude in feet per minute?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?