I need help on how many millimeters it has. It's confusing.
1 answer:
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Answer:
The time it takes to boil 2.2 litres of water is approximately 141 seconds
Step-by-step explanation:
The given parameters are;
The relationship of the variables, T and A is a proportional, therefore, we have;
T ∝ A, or T/A = k = Constant of proportionality
The time it takes to boil 2.8 liters of water = 180 seconds
∴ When A = 2.8 litres, T = 180 seconds, from which we have;
k = T/A = 180 s/(2.8 L) = 450/7 s/L
k = 450/7 s/L
When A = 2.2 litres, we have;
T/A = k
∴ T = k × A
Plugging in the value for both 'k', and 'A' when A = 2.2 litres, gives;
T = k × A = 450/7 s/L × 2.2 L = 990/7 s = 141. s
The time it takes to boil 2.2 litres of water, given a direct proportionality relation is, T = 141. seconds ≈ 141 seconds given to the nearest second.
Answer:
5 7/8
Step-by-step explanation:
She needs the sum of all those days to equal 22 miles. The easiest thing to do is to convert those mixed fractions to improper, then use the LCD to get rid of all the fractions altogether.
Those improper fractions are:
with x being the number of miles she has to run on Friday, the unknown we are solving for.
The LCD of those denominators is 8, so we will multiply every single term by 8 to get rid of the fractions, leaving us with:
38 + 41 + 50 + 8x = 176 and
129 + 8x = 176 so
8x = 47 and
x = 47/8 which is
5 7/8 in mixed form