Carl needs 500 points to be exempted from his math exam. So far, Carl has 400 points. What percent of the points that Carl needs has he already earned? 40%, 50%, 60%, 80%

(urgent ) use pi 3.14 to estimate the circumference of the circle to the nearest hundredth middle is 4in (urgent )

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Find the value of x that will make l ll m