Read and write the number 600,000 +80,000+10 in two other forms

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =