A vehicle is traveling at a rate of 80 kilometers per hour. How many miles per hour is this?

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?

How do i do this activity, is appreciated

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?