Beginning at sunrise, the temperature rose 2.4 degrees per hour. How long did it take for the temperature to rise a total of 20.46 degrees?

HELP ME PLSSS

What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )