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Marina86 [1]
2 years ago
6

100 points and brainliest if you answer correctly!!

Mathematics
1 answer:
nirvana33 [79]2 years ago
3 0

P=10000

R=7.2%

T=7years

Interest be I

\\ \sf\longmapsto I=\dfrac{PRT}{100}

\\ \sf\longmapsto I=\dfrac{10000(7.2)(7)}{100}

\\ \sf\longmapsto I=504

Total paid=10000+504=10504$

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A researcher claims that the average annual salary of part-time community college instructors is at least $45,000. To test this
Doss [256]

Answer:

See explanation

Step-by-step explanation:

Solution:-

- The researcher claims :

" the average annual salary of part-time community college instructors is at least $45,000 "

- We will extract the claim made by the researcher to be the Null hypothesis:

                     Null Hypothesis : μ ≥ $45,000

- Any statement otherwise, or point of rejection criteria will denote the Alternate hypothesis that disbands the claim that:

" the average annual salary of part-time community college instructors is less than $45,000 " :

                    Alternate Hypothesis : μ < $45,000

- This type of test with a sample size of n = 25 < 30 and population standard deviation is also not given hints the use t-test statistics and t-critical value reject the claim.

                     Lower tail - one sample - T-test.

6 0
3 years ago
Polygon C has an area of 40 square units and someone drew a scaled version of polygon C with a scale factor of 1/2 and labeled i
77julia77 [94]

Answer:

20 square units

Step-by-step explanation:

If Polygon C has an area of 40 square units, and we are told that Polygon D is a copy of Polygon C but with a scale factor of 1/2, then everything for Polygon D would just be one-half of what it was for Polygon C. Thus, the area would be half of 40 square units, or, 20 square units.

6 0
3 years ago
The Rule of 72 is a useful approximation for many interest rates and periods for the time it takes a lump sum to double in value
iren2701 [21]

Answer:

The number of years to double the lump sum in value is;

N = 72/10 = 7.20

N = 7.20 years

Step-by-step explanation:

Using the rule of 72 for the approximation:

The formula for rule of 72 is;

Number of years to double = 72/interest rate in percentage

Given;

Interest rate = 10%

The number of years to double the lump sum in value is;

N = 72/10 = 7.20

N = 7.20 years

3 0
3 years ago
Can someone help with this I don’t understand
Karo-lina-s [1.5K]

Answer: see below

Step-by-step explanation:

3x-12=7x+8 ⇔ given

   -12=4x+8 ⇔ addition property of equality

   -20=4x ⇔ subtraction property of equality

      x=-5 ⇔ division property of equality

-----------------------

5(x-1)=4x+13 ⇔ given

5x-5=4x+13 ⇔ distributive property

 x-5=13 ⇔ subtraction property of equality

    x=18 ⇔ addition property of equality

3 0
3 years ago
Simplify to create an equivalent expression. \qquad{-2(-5n+6)+5(2-7n)}−2(−5n+6)+5(2−7n)minus, 2, left parenthesis, minus, 5, n,
Usimov [2.4K]

Answer:

The equivalent expression is - 25n - 2 and it matches with option D.

Step-by-step explanation:

We have to simplify and create the equivalent expression for

{- 2(- 5n + 6) + 5(2 - 7n)}

Now, {- 2(- 5n + 6) + 5(2 - 7n)}

= 10n - 12 + 10 - 35n

= - 25n - 2

Therefore, the equivalent expression is - 25n - 2 and it matches with option D. (Answer)

5 0
3 years ago
Read 2 more answers
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