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4 years ago

9

Round each number to the nearest tenth.

2 answers:

cupoosta [38]4 years ago

3 0

B,
the exact answer is 84.96, so most likely rounded,

RULES:
5 or above, shove it up.
4 or below, leave it.

9 is higher than 5, obviously.

So, B is the answer.

~MisterMistyEyed

kobusy [5.1K]4 years ago

3 0

382.24-297.28= 84.96
Answer: B 85
To round a number it must be 5 or higher so since the nine in .9 is higher than five it raises the number to 85. And there are no numbers after that. That is the rule so it goes for any other ones too like, 100th or 1000th.

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Step-by-step explanation:

Add them up then divide by the amount of numbers there are.

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The height of a trapezoid is 8 in. And its area is 96 in2. One base of the trapezoid is 6 inches longer than the other base. Wha

Vsevolod [243]

Answer:

The lengths of the bases are 9 inches and 15 inches.

Step-by-step explanation:

The area of trapezoid is

$=\frac12(\textrm{ sum of parallel sides})\times height$

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Since one base of the trapezoid 6 in. longer than the other.

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According to the problem,

$\frac12(2b_2+6)\times8 =96$

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$\Rightarrow 2b_2=24-6$

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4 years ago

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Answer:

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<u><em>Please mark as brainliest </em></u>

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3 years ago

A tank contains 250 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu

VashaNatasha [74]

Answer:

$A(t)=250-210e^{-\frac{t}{50}}$

Step-by-step explanation:

We are given that

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We have to find the number A(t) of grams of salt in the tank at time t.

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Rate out= $\frac{A}{250}\times 5=\frac{A}{50}$ L/min

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Using the formula

$\int \frac{dx}{x}=ln x$

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Substitute the value

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$t=50ln\frac{210}{250-A}$

$\frac{t}{50}=ln\frac{210}{250-A}$

$\frac{210}{250-A}=e^{\frac{t}{50}$

$\frac{250-A}{210}=e^{-\frac{t}{50}}$

$250-A=210e^{-\frac{t}{50}}$

$A(t)=250-210e^{-\frac{t}{50}}$

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4 years ago