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2 years ago

What is the following following product 4 square 7 • 4 square root 7• 4 square root 7 •4 square root 7

Mathematics

1 answer:

iVinArrow [24]2 years ago

5 0

Answer:

The value of product is 7.

Step-by-step explanation:

Since we have given that

4 square 7x4 square root 7x4 square root 7x4 square root 7

We need to find the product of the following terms:

We will apply the "law of exponents":

i.e.

(a^m)^n=a^{mn}

4 square 7x4 square root 7x4 square root 7x4 square root 7

=7 ^(1/4)4=7

Hence, the value of product is 7.

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Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation i

Mnenie [13.5K]

Answer:

The population mean = sample mean = x`= 67.5

Population standard deviation = 13.369

Sample standard deviation= 4.225

Step-by-step explanation:

AS the population mean is not given we will calculate it from the sample.

The mean of the sampling distribution is equal to the population mean .

The sample mean is calculated by

x`= ∑x/n= 75,+ 62, +69,+65,+66,+64, +67,+70,+74 + 63/10

x`=675/10= 67.5

The standard deviation of the sample is equal to

u = σ/ √n where σ is the population standard deviation and n is the number of observations.

Calculating the sample mean

s= √∑xi²/n- (∑x/n)²

s= √(45741/10)- (675/10)²

s= 4.2249

σ= u*√n= 4.229 *√10

σ=13.360

3 0

2 years ago

The price of a new SMART television was reduced from $250 to $200. By what percentage was the price of the television reduced?

Novosadov [1.4K]

Answer:

20%

Step-by-step explanation:

if the 100% of the price is $250 and the discount is $50 then to find what percent $50 we multiply 100 by 50 then divide it with 250

100 × 50 ÷ 250 = 20

6 0

3 years ago

Please help me answer this question and show work (see attached)

lyudmila [28]

5.6*1 2/5 = 5 3/5 * 1 2/5 =28/5 * 7/5 = 196/25 = 784/100 = 7.84 or 7 21/25

4 0

2 years ago

1. Jeremy has $12000 cash to invest in the bank compounded at 4% interest annually.

gavmur [86]

Answer:

$A(x) = 12000(1.04)^x$

Step-by-step explanation:

Compound interest:

The compound interest formula is given by:

$A(t) = P(1 + \frac{r}{n})^{nt}$

Where A(t) is the amount of money after t years, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per year and t is the time in years for which the money is invested or borrowed.

$12000 cash

This means that $P = 12000$