A and B are independent events. PA) = 0.40 and PCB) = 0.30. What is PA and B)?
A. 0.12
B. O
C. 0.70
D. 0.012

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?

Leila is buying a dinosaur model. the price of the model is xxx dollars, and she also has to pay a 7\%7%7, percent tax.

Ribbon a is 1/3 meters long. it is 2/5 meters shorter than ribbon b. what's the total length of 2 ribbons?