The figure shows two semi circles. Find the area of the shaded part.
The book only gives me the length of the base , I’m confused.
Help please!!

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?

Mikes car gets an average of 28 mpg. there are 12 gallons of fuel in mikes car when he starts his trip of 140 miles. about how many gallons are left at the end of his trip?