4) Engineers Rob and Kyla have designed rectangular culverts to carry water
under a new highway. They estimate that the distance under the highway is
45 m. Determine the volume of concrete they need to make the required
number of culvert pieces. Give your answer to the next highest tenth of a
cubic metre

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

8x - 61 = 17add 8x = 88x = 11 (cannot be proven)4(3(7) - 8) = 524(21 - 8) = 5284 - 32 = 52 (proven)

The the ratio