Can someone help please?!

Mathematics

2 answers:

trasher [3.6K]3 years ago

6 0

18 score

1) 25/100= .25
2) .25x70= 17.5
since you can’t have 17.5 for answer
estimate it to 18

anygoal [31]3 years ago

3 0

Answer

The correct answer would technically be 17.5 questions for exactly 70 percent depending on if it gives you half points for 2 part questions or half of the question being right.

The computer would probably except 18 questions to be correct but not 17.

Step-by-step explanation:

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The length, width, and height of a right rectangular prism are multiplied by 23. What will be the effect on the volume of the pr

Yanka [14]

Since none of the options make sense with 23, I assume it was a typo, and you meant 2/3.

Let l,w and h be the length, width and height of the original prism, and l',w' and h' be the length, width and height of the new prism. We are given

$l' = l\times \cfrac{2}{3},\quad w' = w\times \cfrac{2}{3},\quad h' = h\times \cfrac{2}{3}$

Also, if we call V the original volume, and V' the volume of the new prism, we have

$V = lhw,\quad V'=l'h'w'$

Substitute the expressions for l', h' and w' in the formula for V':

$V'=l'h'w' = l\times \cfrac{2}{3}\times w\times \cfrac{2}{3}\times h\times \cfrac{2}{3} = l\times h \times w \times \cfrac{2}{3}\times\cfrac{2}{3}\times\cfrac{2}{3} = V \times \left(\cfrac{2}{3}\right)^3 = V\times\cfrac{8}{27}$