Answer:
184 cm²
Step-by-step explanation:
Surface area of the rectangular box is expressed as S = 2(LW+LH+WH)
L is the length of the box = 90 cm
W is the width of the box = 50 cm
H is the height of the box= 90 cm
If there are error of at most 0.2 cm in each measurement, then the total surface area using differential estimate will be expressed as shown;
S = 2{(LdW+WdL) + (LdH+HdL) + (WdH+HdW)
Note that dL = dW = dH = 0.2 cm
Substituting the given values into the formula to estimate the maximum error in calculating the surface area of the box
S = 2{(90(0.2)+50(0.2)) + (90(0.2)+90(0.2)) + (50(0.2)+90(0.2))
S = 2{18+10+18+18+10+18}
S = 2(92)
S = 184 cm²
Hence, the maximum error in calculating the surface area of the box is 184cm²
Answer: I agree with Gloria because 10 times 354.6 is 3546
Step-by-step explanation:
-3/5x + 1/5 > 7/20
-3x + 1/5 > 7/20 join the denominators
-3x + 1 > 7/20 * 5 multiply both sides by 5
-3x + 1 > 35/20
-3x + 1 > 7/4
-3x > 7/4 - 1
-3x > 3/4
x < -3/4 ÷ 3
x < -1/4
hope that helps, God bless!
Answer:
if his car-wash job gives him $400 then he should only work 8 hours walking dogs to reach 520. Though it says to earn 'more than $520' so maybe 9hrs?
Step-by-step explanation:
He already has $400, which leave $120. 120 divided by 15 equals 8.
Add 5 and eliminate parentheses
... y = -2x +6 +5
Simplifying, you get
... B. y = -2x +11
