4. The table shows the dimensions of three rectangular pyramids designed by three students. What is the combined volume of the three pyramids in cubic inches? Student Base Length Base Width Height Arielle 15 in. 12 in. 9 in. Destiny 12 in. 10.5 in. 6 in. Alexis 9 in. 9 in. 4.5 in. 304.5 0 2,740.5 913.5 0792​

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.