It took an escalator 12 seconds to descend to the ground level. What is the domain of this graph?
Escalator Height
24
22
20
10
10
Height (feet)
0
01112
24
Time (seconds)
D
A. OS X 24
e
B. X20
C. OS XS 12
D. All real number

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Can someone me with this problem i don't understand i need

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.