Given the curve y=3x^5+6x^4-4x^3+1 find it's turning point and point of inflection

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.