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3 years ago

The radius of a circle is 4 feet. What is the circle's circumference?Use 3.14 for r=4 ft

Mathematics

1 answer:

Lady_Fox [76]3 years ago

5 0

Answer:

50.24 is the circumfrence

If we were to use actual pi the answer would be -

50.26548246

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(2x^4 - 6x^2+8) + (-x^4+ 2x^2-12)

Neko [114]

(2x^4 - 6x^2+8) + (-x^4+ 2x^2-12)
=2x^4-6x^2-x^4+2x^2-12
=x^4-4x^2-12

Just watch your signs when opening up the brackets and then collect like terms.

3 0

4 years ago

Each day that a library book is kept past its due date, a $0.30 fee is charged at midnight. Which ordered pair is a viable solut

Mars2501 [29]

Answer:

Option (4)

Step-by-step explanation:

An ordered pair (x, y) represents,

x = number of days that a library book is late

y = Total fee for the delay

Late fee of a library book = $0.30 per day

Then late fee of a book for the delay of 'x' days,

y = per day fee × number of days delayed

y = $0.30\times x$

Option (1). For (-3, -0.90)

Since number days can't be negative so not the answer.

Option (2). For (-2.5, -0.75)

Number of days are negative so can't be the answer.

Option (3). For (4.5, 1.35)

Fee for 4.5 days will be,

y = 0.30(4) [Since fee is charged after completion of one day or in the midnight]

Fee for 4.5 days will be the same as fee for 4 days.

y = $1.20

Therefore, this option will not be the answer.

Option (4). For (8, 2.40)

y = 0.30x

y = 0.30(8)

y = 2.40

Therefore, option (4) will be the answer.

3 0

3 years ago

PLEASE HELP!! (x-7)^3 (x+2)^2 (x-13) <0

ahrayia [7]

X^6<-348 is the answer

4 0

3 years ago

A rental car company charges $68.80 per day to rent a car and $0.08

viktelen [127]

Answer:

5 days maximum

Step-by-step explanation:

Given

Daily charge = $68.80
Charge per mile = $0.08
Target distance = 325 miles
Money limit = $370

Required inequality:

68.8d + 325*0.08 ≤ 370

Solving for d:

68.8d + 26 ≤ 370
68.8d ≤ 344
d ≤ 344/68.8
d ≤ 5

Up to 5 days is the answer

7 0

3 years ago

question 31 pts a fair six-sided die is tossed 300 times. find the expected value of the sample mean of the values obtained in t

mojhsa [17]

The expected value of the sample mean of the values obtained in these 300 tosses is 3.5

Given :

A fair six sided die is tossed 300 times

We have to find the expected value of the sample mean of the values obtained in these 300 tosses.

A dice have six sides:

In a fair dice every side has equal chance of occurrence,

Now the probability of presence of each side = 1/6

Now the expected value of the sample mean of the values obtained in these 300 tosses is given by:

E(x) = Σx P(x =x)

= 1*1/6 + 2*1/6 + 3*1/6 + 4*1/6 + 5*1/6 + 6*1/6

= 1/6 + 2/6 + 3/6 + 4/6 + 5/6 + 6/6

= 1/6 (1+2+3+4+5+6)

= 1/6 (21)

= 21/6

E(x) = 3.5

Hence, the expected value of the sample mean of the values obtained in these 300 tosses is 3.5

To know more about sample mean check the below link:

brainly.com/question/29739571

#SPJ4

3 0

2 years ago