Cho biết hàm đầu tư I = 20.t1/4 và quĩ vốn tại thời điểm t = 0 là 70. Tìm hàm quĩ vốn K(t) tại thời điểm t = 81.
plz mọi người giúp mình với ạ.

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

The measures of two supplementary angles are (2x + 10)° and (8x + 10)°. what is the measure of the larger angle? a. 16° b. 44° c. 14° d. 138°

Are you guys willing to me with these last 8 questions on my homework for math reply to this question that i posted