3. 9x10^4. 4. 5x10^7. Please answer 3 and 4

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Find the length of the diagonal of the rectangle. round your answer to the nearest tenth. || | | 8 m | | | | 11 m