The answer is: [C]: "30%" .
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Explanation:
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Note that: "%" ; or "percent" means "out of 100" ; or "divided by 100" .
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Method 1)
15/50 = ?/ 100 ;
Look at the denominators:
50 * (what value?) = 100 ? ; → "100 ÷ 50 = 2" ;
→ 50 * 2 = 100 ;
So: "15/50 = (15*2)/(50*2) = "30/100" ; which is "30%" .
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Method 2:
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"15/50" = (15÷5) / (50÷5) = 3/10 ;
3/10 = (3*10) / (10*10) = 30/100 ; which is: "30%" .
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Method 3: (slight variation of "Method 2" above):
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"15/50" = (15÷5) / (50÷5) = 3/10 ;
3/10 = 0.3 = 0.30 = (0.30 * 100) % = " 30% " .
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Answer:
area = 3.44 in²
Step-by-step explanation:
area of square = 4 x 4 = 16 cm²
area of circle = (3.14)(2²) = 12.56 cm²
area = 16 - 12.56 = 3.44 in²
Answer:
D. 160J
Step-by-step explanation:
Work = Force * Distance
but where is the force?
from here:
weight (not mass) is a force unit (Newtons) so it can be used here.
How do we get weight?
Mass * G
what is G?
gravity force... and it equals 9.8
so you take the box's mass (9.10)
multiply by 9.8 (9.10*9.8 = 89.18)
then plug into the first equation as the force (work= 89.18 * distance)
we also plug In the distance (work = 89.18 * 1.8)
and solve for work! (work = 89.18 * 1.8 = 160.52400)
then round the to the closest one (160)
and there you go! you've got your answer!
Hope this helps,
Yotam
P.S you can comment back if you are still confused and I will try to explain it again better.
