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german
3 years ago
11

The price of a 5​-minute phone call is ​$1.25. What is the price of a 15​-minute phone​ call?

Mathematics
1 answer:
posledela3 years ago
7 0

Answer:

3.75

Step-by-step explanation:

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A new surgical procedure is said to be successful 60% of the time. Suppose the operation is performed five times and the results
USPshnik [31]

Answer:

0.07776, 0.3456,0.08704

Step-by-step explanation:

Given that a new surgical procedure is said to be successful 60% of the time

Let X be the no of successes

Then X has only two outcomes and each trial is independent of the other

Hence X is binomial with p = prob of success in a single trial = 0.60

n = Number of operations performed = 5

Prob that

a) all five operations are successful =

P(X=5)\\= (0.6)^5\\=0.07776

(b) exactly three are successful

=P(X=3) = 5C3 (0.6)^3(0.4)^2\\= 0.3456

(c) less than two are successful

==P(X

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3 years ago
The price of a share of one stock fell from $8.75 to $8.54. Find the percent decrease. Round your answer to the nearest tenth of
hram777 [196]

8.54 / 8.75 =0.975

1 - 0.975 = 0.025

0.025 x 100% ( and nearest thenth)

=2.5%

6 0
3 years ago
Read 2 more answers
If f(6) if f(x)=x^2 / 3 + x
MakcuM [25]

Answer:

1) If the function is f(x)=\frac{x^{2}}{(3+x)}, f(6)=4

2) If the function is f(x)=x^{(2/3)}+x, f(6)=9.30

3) If the function is f(x)=\frac{x^{2}}{3}+x, f(6)=18

Step-by-step explanation:

To solve this problem you must apply the proccedure shown below:

f(6) means that you must substitute x=6 into the function above.

1. If the given the function f(x)=\frac{x^{2}}{(3+x)}, you obtain:

f(6)=\frac{6^{2}}{(3+6)}=4

2. If the function is f(x)=x^{(2/3)}+x

Then:

f(6)=6^{(2/3)}+6=9.30

3. If the function is f(x)=\frac{x^{2}}{3}+x

Then:

f(6)=\frac{6^{2}}{3}+6=18

6 0
3 years ago
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Evaluate the following expression when x = -5 and y = 25. A. -3,130 B. 620 C. 3,120 D. -630
lys-0071 [83]

Answer: question not complete

Step-by-step explanation: add the expression

6 0
3 years ago
The number of nails in a 5 lb box is normally distributed with a mean of 325 nails and a standard deviation of 15 nails. suppose
saul85 [17]

Answer:

192

Step-by-step explanation:

Trust me :)

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2 years ago
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