Megan is checking her tax bill for the last year. The tax rates were as follows
No tax on the first f11 000 of earnings
Earnings in excess of $11 000 and up to $43 000 taxed at a rate of 20%
Earnings in excess of f43 000 and up to $150 000 taxed at a rate of 40%
Earnings over $150 000 taxed at a rate of 45%
Last year, Megan earned $158 900 before tax.
How much tax did she pay in total?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?