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3 years ago

The circumference of a circle measures 11.27π ft.What is the measure of the diameter of this Circle?

Mathematics

1 answer:

Naddika [18.5K]3 years ago

4 0

C. 11.27π feetDiameter= 11.27 feet.

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1.-si el area de un rectangulo es de 144 metros cuadrados y su altura de 8 metros ¿ cual es el valor de su base?

kari74 [83]

Step-by-step explanation:

FÓRMULA:

$144 m^{2}$ = b(8 m)

SE DESPEJA

b = $144 m^{2}$ /8 m = 18 m

5 0

3 years ago

Write the equation in exponential form. log4 1/16 = -2

Allisa [31]

The answer is 4^-2 = 1/16

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3 years ago

2. The alkalinity of a fluid (pH) can be modeled in terms of its hydrogen ion concentration (H+, measured in moles/liter) of the

nataly862011 [7]

Given the equation:

$pH=-log\mleft(H^+\mright)$

You know that a lab technician finds that a sample of fluid has this pH:

$pH=4.5$

Then, in order to find the hydrogen ion concentration of the fluid, you need to follow these steps:

1. Substitute the pH given in the exercise into the equation:

$4.5=-log(H^+)$

Multiply both sides by -1:

$-4.5=\log (H^+)$

2. Solve for:

$H^+$

Remember that, by definition:

$\log _b\mleft(c\mright)=a\Rightarrow b^a=c$

In this case, you can identify that:

$\begin{gathered} a=-4.5 \\ b=10 \\ c=H^+ \end{gathered}$

Hence, substituting values and simplifying, you get:

$\begin{gathered} b^a=c \\ 10^{-4.5}=H^+ \\ H^+=0.00003162278\text{ }\frac{moles}{liter} \end{gathered}$

Therefore, the answer is:

$H^+=0.00003162278\text{ }\frac{moles}{liter}$

4 0

1 year ago

Graph the system of inequalities

mihalych1998 [28]

Answer: To graph a linear inequality in two variables (say, x and y ), first get y alone on one side. Then consider the related equation obtained by changing the inequality sign to an equality sign. The graph of this equation is a line. If the inequality is strict ( < or > ), graph a dashed line.

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3 years ago

Among the eighth-graders in Micheal's school, 70% have siblings. The eighth-grade class is 5/6 the size of the seventh-grade cla

sladkih [1.3K]

OK so if 70% of students in 8th grade have siblings and 112 8th graders have siblings, then:

0.7(total 8th graders) = 112

total 8th graders = 112/0.7

total 8th graders = 160

And since the number of 8th graders is 5/6 the size of the 7th grade class:

5/6(7th grade class) = 160

5(7th grade class) = 960

7th grade class = 192.

<span>The correct answer is D) 192.</span>

4 0

3 years ago

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