Pennies used to be made of copper and zinc and had a mass of 3.1g today pennies are made of copper plated zinc and have a mass of 2.5 G. A new pennies mass is what percent of an old pennies mass?

In the United States, the number y (in millions) of bicycles sold with wheel sizes of 20 in. or greater can be modeled by the equation y = 0.3x + 15, where x is the number of years since 1981. In what year were about 22 million bicycles sold?

What is the general form of the equation of a circle with its center at (-2, 1) and passing through (-4, 1) ? x2 + y2 - 4x + 2y + 1 = 0 x2 + y2 + 4x - 2y + 1 = 0 x2 + y2 + 4x - 2y + 9 = 0 x2 - y2 + 2x + y + 1 = 0

Mr. rodriguez works at a store. He wants to arrange 16 toys in a displayed shaped like a rectangular prism. How many rectangular prisms with different size bases can he make with the boxes?

Mr. Weisner is using 81 padded squares to make a workout area in his house. Each square measures 1 meter by 1 meter. He wants to arrange the 81 squares in a rectangular shape with the smallest possible perimeter.

Maddie buys stock that is worth $22 per share. On the first day, the value of the stock goes up 20%. On the second day, the value decreases by 10%. What is the value of each share at the end of the second day?

What is 7 1/5 minus 6 2/5?

A man had 3 apples the man gave a other man 3 apples how many apples does he have left

Find the missing coordinate to complete the ordered pair. y = - x + 5 (9,) (9,-7) (9,-4) (9,4) (9,7)

Last year, Sally had a gross profit margin of 68% in her hair salon. Her gross profit was $32,508.63. How much did Sally make in net sales last year? a. $16,398.06 b. $22,105.87 c. $35,610.25 d. $47,806.81 The answer is D

Rather made a 10 to figure out sum for 9 + 3. Explain eathens thinking