Math experts please help

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?

Is there an x intercept in the equation 60*1.15^x

Factor the polynomial. b^2 + 4b + 4