How many 4-digit numbers, all of the digits of which are odd, are there?

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.