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exis [7]
3 years ago
14

What are the answers to these two ? HELP PLEASE

Mathematics
1 answer:
masya89 [10]3 years ago
4 0

Answer:

1. D     2. A

Step-by-step explanation:

Can I have Brainllest answer Please I need It.

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Assume that when adults with smartphones are randomly​ selected, 57​% use them in meetings or classes. If 8 adult smartphone use
maxonik [38]

Answer:  0.0575

Step-by-step explanation:

Binomial probability distribution :-

P(x)=^nC_xp^x(1-p)^{n-x}, where P(X) is the probability of getting success in x trials, n is the total number of trials and p is the probability of success in each trial ( in  decimal ).

Given : The probability that adults use smartphones  in meetings or classes = 0.57

Sample size : n= 8

Now, the probability that exactly 2 of them use their smartphones in meetings or classes :-

P(x)=^8C_2(0.57)^2(0.43)^{6}\\\\=\dfrac{8!}{(8-2)!2!}(0.57)^2(0.43)^{6}\\\\=0.0575067039294\approx0.0575

Hence, the required probability = 0.0575

6 0
3 years ago
I need help please find answers for both of them worth 15 points
Step2247 [10]

Answer:

Volume = 9900 ft2

Step-by-step explanation:

To find the volume of the pool, we can use the base as the trapezoid, and then we need to calculate the base area and multiply by the height.

The trapezoid has a bigger base of 8 and a smaller base of 3, with a height of 60, so the area is:

Area = (8+3)*60/2 = 330 ft2

Now, to find the volume, we just need to multiply the base area by the height of 30 feet:

Volume = Area * Height = 330 * 30 = 9900 ft2

5 0
3 years ago
Naomi’s fish Is 40 mm long her guinea pig is 25 cm long how much longer is her guinea pig than her fish
tia_tia [17]
1.) Convert the measurements of Naomi's pets so that the two has the same unit of measurements. I will use cm.
                     1 mm = .01 cm;
Therefore:  40 mm = 4 cm is the length of the fish
2.) Subtract the pets' measurements:
         25 cm - 4 cm = 21 cm
3.) Therefore, Naomi's guinea pig is 21 cm longer than her fish.
5 0
4 years ago
PLS HELP MEEEEEEE
ExtremeBDS [4]

Answer:

The one that wieghs 10 grams

Step-by-step explanation:

4 0
3 years ago
Sean has two single accounts at Corona Bank. One account has a balance of $174,898.09 and the
klasskru [66]
$452898.08 is the answer
3 0
3 years ago
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