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OlgaM077 [116]
3 years ago
14

A scientist estimated that a mixture would need 6 milliliters of a chemical to balance. The actual amount needed was 7 millilite

rs. What was the percent error of the scientist's estimation?
Mathematics
1 answer:
Mashcka [7]3 years ago
6 0
Percent relative error is calculated by the formula: (experimental value - literature value/ experimental value) x 100%

Therefore, (6-7/7) x 100% = 14.3%
Your answer is in absolute value :)
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Arthur Jackson can run 1,500 meters in about 3 1/2 minutes. How many meters per minute is this?
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A rectangular parking lot has a perimeter of 820 ft. The area of the parking lot measure SL 42,000 ft
horsena [70]

Answer:

a= 200

b = 210

Step-by-step explanation:

My assumption is, we have to find the length of sides of rectangle

Given

perimeter = 2a + 2b = 820 ft (i) (here a is smaller side and b is larger side)

area = a*b = 42,000 ft^2 (ii)

from eq (1)

2a + 2b = 820

=> 2(a+b) = 820

=> a+b = 820/2

=> a + b = 410

=> a = 410-b   (iii)

putting the value of a in eq(ii), we get

(410-b) *b = 42,000

410b - b^2 = 42,000

0 = b^2 - 410b + 42000

b^2 - 410b + 42000 = 0

b^2- 200b- 210b + 42000 = 0

b(b-200)-210(b-200) = 0

(b-200)(b-210) = 0

or

b= 210 and b = 200

if b is larger side than b =210

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6 0
3 years ago
Justin sells 78.5 ounces of lemonade for a total of $15.70.
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Answer:

5

Step-by-step explanation:

This is a pretty simple question to answer, the one step that needs to be done is divide 78.5 by 15.7. You should come up with 5.

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