What is 1/2 percentage of a whole number (show work if u can) HELP IM DUM

2 1/7 :(1.5a)= 5/14 :0.8 PLEASE HELP NEED ANSWER BY TOMORROW

koban [17]

Value of a is 3.22

Step-by-step explanation:

Solving the given expression:

$2\frac{1}{7}:(1.5a)=\frac{5}{14}:0.8$

Solving and finding the value of a.

$2\frac{1}{7}:(1.5a)=\frac{5}{14}:0.8\\\frac{15}{7}:(1.5a)= \frac{5}{14}:0.8\\Ratio\,\,can\,\, be\,\, written\,\, in\,\, fraction\,\, form:\\\frac{\frac{15}{7}}{1.5a}=\frac{\frac{5}{14}}{0.8}\\ Cross\,\,multiply:\\\frac{15}{7}*0.8=\frac{5}{14}*1.5a\\1.71=0.53\,\,a\\a= \frac{1.71}{0.53}\\a=3.22$

So, value of a is 3.22

Keywords: Ratio

Learn more about Ratio at:

#learnwithBrainly

4 0

3 years ago

Please help i’m talking an very important test

Lilit [14]

Answer:

D.) 4

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What is 8-p/2 is less than or equal to 4?

Vanyuwa [196]

Less than (yes) p > -4

equal to (yes) p = -4

less than or equal to (yes) p (less than or equal to) -4)

I feel like I may have misinterpreted the question..

5 0

3 years ago

I need help ASAP like I might actually fail

natulia [17]

2x + 7 ≤ 3x - 5

Start by keeping the variable x on the left side of the inequality, and move everything else to the right side.

We can do this by subtracting 3x from both sides and subtracting 7 from both sides.

-x ≤ -12

Divide both sides by -1 to make x a positive; when dividing by a negative number you will flip the inequality sign, so ≤ becomes ≥.

x ≥ 12

Possible solutions for x are any number equal to or greater than 12.

8 0

3 years ago

Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. Whe

podryga [215]

Answer:

The value is $n = 384$

The correct option is a

Step-by-step explanation:

From the question we are told that

The margin of error is E = 0.05

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally since the sample proportion is not given we will assume it to be

$\^ p = 0.5$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )$

=> $n = [\frac{ 1.96 }{0.05} ]^2 *0.5 (1 - 0.5)$

=> $n = 384$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{\sigma }{\sqrt{n} }$

Generally if the level of confidence increases, the critical value of $\frac{\alpha }{2}$ increase and from the equation for margin of error we see the the critical value varies directly with the margin of error , hence the margin of error will increase also

So If the confidence level is increased, then the sample size would need to increase because a higher level of confidence increases the margin of error.

8 0

3 years ago