You invest $10,000 for 40 years. Determine the amount that it will grow at the following rates:

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.