I need the answers for 2 and 3

17 in long 1.3 ft wide and 8in high what is the volume

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.