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Yanka [14]
4 years ago
12

What is the sample size of a test containing 5 true or false questions probability

Mathematics
1 answer:
11Alexandr11 [23.1K]4 years ago
5 0

Answer:

20 to 25 questions would be the size of a math test

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If a musician uses his credit card to pay for a new violin that costs $2,900 and does not pay on it until the second month, what
xenn [34]

Solution:

1.  Cost of a new Violin that is bought by the musician = $ 2900

Monthly interest charge = 3.35 %

If you will find the compound interest or simple interest for a month, they both will be same for a month.

Simple interest =

\frac{Principal \times Rate \times Time}{100}

 =\frac{2900 \times 3.35 \times 1}{ 100}\\\\ =29 \times 3.35\\\\ =97.15

Interest paid at the end of first month = $ 97.15

2. Loan Amount = $ 3,500

Annual interest = 8 %

Time period = 2 years= 24 months

As , we have to find the  total payback  for two years, at 8% annual interest with monthly payments .we will use the formula of Amount in terms of compound interest here.

Formula for Amount

Amount= Principal (1 +\frac{Rate}{100})^{time}]

          =3500 \times [(1+\frac{8}{1200})^{24}]\\\\ = 3500 \times [(1.0066)^{24}]\\\\= 3500 \times  1.1710 \\\\ =4098.58

Total payback after 2 years = $ 4098.58


3 0
4 years ago
The difference of 7 and the product of 4 and a is 11
BlackZzzverrR [31]
Product of 4 and a number translates to 4x because the word product means multiplication.
We then need to subtract one from that which would be 4x - 1.
The word is translates to "equals" so 4x - 1 = 11 is the translation of the whole problem.

Now solve that equation.
4x - 1 = 11
1st add +1 +1
2nd simplify 4x = 12
3rd divide. 4 4
x = 3
3 0
3 years ago
Read 2 more answers
Which steps can be used to verify that tan(w + Pi) = tan(w)? Rewrite tan(w + Pi) as tan(w) + tan(Pi). Then simplify the expressi
Artist 52 [7]

Answer:

Rewrite tan(w + Pi) using the tangent sum identity. Then simplify the resulting expression using tan(Pi) = 0

Step-by-step explanation:

According to tangent sub identity

Tan(A+B) = TanA+TanB/1-tanAtanB

Applying this in question

Tan(w+Pi) = tan(w)+tan(pi)/1-tan(w)tan(pi)

According to trig identity, tan(pi) = 0

Substitute

Tan(w+Pi) = tan(w)+0/1-tan(w)(0)

Tan(w+Pi) = tan(w)/1

Tan(w+Pi) = tan(w) (proved!)

Hence the correct option is

Rewrite tan(w + Pi) using the tangent sum identity. Then simplify the resulting expression using tan(Pi) = 0

3 0
3 years ago
Lauren went to the store an bougth a red hat for $32 and a black hat for $8 how many times as much did the red hat cost as the b
Firlakuza [10]

Answer:

I think 4

Step-by-step explanation:

Red hat costs $32

black hat costs $8

32 (divided) by 8 is 4

3 0
3 years ago
Read 2 more answers
Thank You please help! Its due in 10 mins
malfutka [58]

Answer:

final answer is 7

Step-by-step explanation:

mental math that I did fast

6 0
3 years ago
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