4. Zach took a science test. He answered 42 questions correctly and 8 questions incorrectly. What percentage of the questions did Zach answer correctly?
A. 26%
B. 42%
C. 50%
D. 84%

Aparallelogram has an area of 216.24 cm2 and a height of 15.9 cm. how long is the base of the parallelogram? enter your answer as a decimal in the box. cm

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

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?