Which expression is equivalent to 3.5x + 4.8?

(a.) 3 • 0.5x + 4 • 0.8

(b.) 3x • 0.5x + 4 • 0.8

(c.) 3 + 0.5x + 4 + 0.8

(d.) 3x + 0.5x + 4 + 0.8

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

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