a spherical cell has a radius of 2.75*10^-6 m. use the formula for the surface area of a sphere S. A=4πr^2 to find the surface area of f a cell. write answer in scientific notation.​

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

W-16=-12 solve each one step equation plz

Which expressions are equivalent to -7+3(-4e-3)? choose all answers that apply: choose all answers that apply: a -4(3e+4)? 4(3e+4) b 12e12e c none of the above