What is the solution of StartRoot negative 4 x EndRoot = 100?

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?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?