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3 years ago

The area and the circumference of a circle whit radius 7 feet.

Mathematics

1 answer:

slega [8]3 years ago

5 0

Answer:

Area= 49 ft

π × 7 2 π × 49

49 π feet

Circumference = 14 ft

2× π × 7

14 π feet

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Anand needs to hire a plumber. He's considering a plumber that charges an initial fee of $ 65 $65dollar sign, 65 along with an h

user100 [1]

Answer:

Step-by-step explanation:

Basic Charge = $ 65

Rate per hour = $ 28

Number of hours = H

Rate for H hours = 28 *H = 28H

Equation:

65 + 28H ≤ 250

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3 years ago

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Herbert has sold 90, 45, 103 and 68 appliances in the last four months, respectively. How many appliances will he need to sell t

Elena-2011 [213]

Answer:

The sale this month = 79

Step-by-step explanation:

Let the amount he needs to sell this month = x

$Average = \frac{sum\ of\ individual\ data\ }{number\ of\ entries}$

$Average= \frac{90\ +\ 45\ +\ 103\ +\ 68\ +\ x}{5}$

Note that number of entries = number of months = 5

To maintain an average sales of 77, the amount of sale in month 5 is determined as follows:

$77 = \frac{306\ +\ x}{5} \\cross-multiplying\\77\ \times\ 5\ = 306\ +\ x\\385 = 306\ +\ x\\x =385\ -\ 306\\x = 79$

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3 years ago

Joshua is trying to determine the number of pizzas to order. If each pizza cost $7, how much will it cost to feed 36 people?

krok68 [10]

252 I believe it is this if each person eats one Pizza

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3 years ago

Evaluate: 16^1/2 x 2^-3

kykrilka [37]

Answer:

Step-by-step explanation:

16^1

---------------------- = 64

2 x 2 - ^3

Apply exponent rule

16^1 = 16

= 16

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

2x2 - ^3

16 = 2x 8

2 x 8

-----------

2 x 2 - ^3

Cancel the common factor <2>

---------

2-^3

Factor the number 8 = 2^3

2^3

----------

2-^3

Apply exponent rule.

= 2^3 - (-3) = 6

3- (-3) = 6

= 2^6

2^6 = 64

64 is the answer

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3 years ago

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Please help with statistic 22

Hitman42 [59]

<h3>Answer: 0.9754</h3>

======================================================

Explanation:

p = 0.58 = probability HR rep says to follow up within two weeks

n = 7 = sample size

Let's calculate the binomial P(x) value for x = 0 which will tell us the probability of having a sample with 0 reps recommending the follow up within two weeks.

$P(x) = (_n C _x)*(p)^{x}*(1-p)^{n-x}\\\\P(0) = (_{7} C _{0})*(0.58)^{0}*(1-0.58)^{7-0}\\\\P(0) = (1)*(0.58)^{0}*(0.42)^{7}\\\\P(0) \approx 0.00230539333249 \\\\P(0) \approx 0.002 305\\\\$

If we were to randomly select a sample of n = 7 HR managers, then there's roughly a 2.305% chance that x = 0 of that group will say to follow up within two weeks. This is when there's a 58% chance of each individual rep of saying "yes".

Repeat for x = 1 and you should find that P(1) = 0.022285 approximately.

Then we can say this:

$P(\text{0 or 1})+P(\text{at least 2}) = 1\\\\P(\text{x=0 or x=1})+P(x \ge 2) = 1\\\\P(0)+P(1)+P(x \ge 2) = 1\\\\P(x \ge 2) = 1-P(0)-P(1)\\\\P(x \ge 2) \approx 1-0.002305-0.022285\\\\P(x \ge 2) \approx 0.97541\\\\P(x \ge 2) \approx 0.9754\\\\$

If we selected a sample of n = 7 HR reps, there's roughly a 97.54% chance that 2 or more reps will recommend following up within 2 weeks.

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3 years ago