The ratio of the number of people who own a smartphone to the number of people who own a flip phone is 4:3 .If 500 more people own a smartphone than a flip phone, how many people own each type of phone?​

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?