Cho hình chóp SABCD có ABCD là hình vuông tâm O cạnh 2a, SA vuông góc (ABCD), SC=4a. Gọi M là trung điểm SC a/ Tính thể tích S. ABCD, S. OCD, M. ABC
b/ Tính góc giữa SC và mặt đáy
c/ Tính khoảng cách từ A đến (SBC)
d/ Tính khoảng cách từ O đến (SCD)

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in