7. The design shown below is constructed by joining three semicircles with diameters of 6, 8, and 10 centimeters. Which of the following is closest to the total length of the curved pieces of this
design?
(1) 15.1 cm
(2) 24.0 cm
8 cm
10 cm
6 cm
(3) 37.7 cm
(4) 75.4 cm

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

We have enough material to build a fence around a station that has a perimeter of 180 feet the width of the rectangular space must be 3 1/4 feet what must the length be

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)