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2 years ago

Round 75,499 to the nearest thousand

Mathematics

2 answers:

lara31 [8.8K]2 years ago

8 0

Answer:

75,000

Step-by-step explanation:

Iteru [2.4K]2 years ago

7 0

75000 because 499 is less than the halfway point any you round down to the lower thousand.
Have a nice day.

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Out of a group of 250 pupils, 10 pupils could not join the school's excursion due to illness.

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Answer:

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3 years ago

Which expression is equivalent to -9x^-1y^-1 / -15x^5 y^-3 Assume x = 0 y = 0

jenyasd209 [6]

For this case we have the following expression:
-9x ^ -1y ^ -1 / -15x ^ 5 y ^ -3
For power properties we have:
-9x ^ (- 1-5) y ^ (- 1 - (- 3)) / - 15
Rewriting we have:
9x ^ (- 6) y ^ (- 1 + 3) / 15
3x ^ (- 6) y ^ (2) / 5
3y ^ 2 / 5x ^ 6
Answer:
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3 years ago

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777dan777 [17]

Step-by-step explanation:

By Geometric mean property:

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3 years ago

A tank initially contains 40 ounces of salt mixed in 100 gallons of water. a solution containing 4 oz of salt per gallon is then

stellarik [79]

Let $A(t)$ be the amount of salt in the tank at time $t$ . We're given that $A(0)=40$ . The rate at which this amount changes is given by

$A'(t)=\dfrac{5\text{ gal}}{1\text{ min}}\cdot\dfrac{4\text{ oz}}{1\text{ gal}}-\dfrac{5\text{ gal}}{1\text{ min}}\cdot\dfrac{A(t)\text{ oz}}{100+(5-5)t\text{ gal}}$

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$A(t)=400+Ce^{-t/20}$

Since $A(0)=40$ , we get

$40=400+C\implies C=-360$

so that the amount of salt at time $t$ is

$A(t)=400-360e^{-t/20}$

After 20 minutes, the tank contains

$A(20)=400-360e^{-20/20}\approx267.56\text{ oz}$

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3 years ago

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Anvisha [2.4K]

Answer:

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3 years ago