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2 years ago

A wall is 300 square feet. A gallon of paint covers 110 square feet. What is an appropriate conversion factor to help

Mathematics

1 answer:

Verizon [17]2 years ago

4 0

The first one? i dont know what else itd be

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The population of bacteria in a petri dish doubles every 24 h. The population of the bacteria is initially 500 organisms. How lo

liberstina [14]

Answer:

16.34 hours

Step-by-step explanation:

According to the given information we can see that the case is of exponential growth

Hence, we will use the formula

$A=P(2)^\frac{t}{24}$

Here A =800 is the amount that is needed to reach

P is the initial amount that is 500

We have to find the time it will take to reach 800 that is we need to find t

On substituting the values in the formula we get

$800=500(2)^\frac{t}{24}$

On simplification we get

$\Rightarrow\frac{8}{5}=(2)^\frac{t}{24}$

Taking log on both sides we get

$\Rightarrow\log\frac{8}{5}=\log(2)^\frac{t}{24}$

using $\log\frac{m}{n}=\log m-\log n$

And $\log a^m=m\log a$

$\Rightarrow\log{8}-\log{5}=\frac{t}{24}\log2$

Now substituting values of log 8=0.903, log 5=0.698 and log 2=0.301 we get

$\Rightarrow 0.903-0.698=\frac{t}{24}0.301$

$\Rightarrow 0.205=\frac{t}{24}0.301$

$\Rightarrow \frac{0.205}{0.301}\cdot 24=t$

$\Rightarrow t=16.34$

8 0

3 years ago

Read 2 more answers

I need help on how to do this as soon as possible please

AfilCa [17]

Answer:

Step-by-step explanation:

m∠1 = m∠2 {Corresponding angles}

78 - 2x = 89 - 3x

Add 3x to both sides

78 - 2x + 3x = 89

78 + x = 89

Subtract 78 from both sides

x = 89 - 78

x = 11

6 0

3 years ago

Charlie wants to know the length of Charlie wants to know the length of a tunnel built through a mountain. To do so, he makes th

nekit [7.7K]

Answer:To do so, she makes the measurements shown in the figure below.

Step-by-step explanation:

3 0

1 year ago

CD and CB are tangent to circle A. If CD = 5x – 13 and CB = 12, find x.<br>

hoa [83]

Answer:

Step-by-step explanation:

because 5•5=25 and 25-13=12

6 0

3 years ago

Help help help help help

Irina18 [472]

Sometimes never always always

5 0

2 years ago