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Anastasy [175]
3 years ago
5

Thirteen of the 100 digital recorders in an inventory are known to be defective. What is the probability you randomly select an

item that is not defective?
Mathematics
1 answer:
julia-pushkina [17]3 years ago
3 0
Subtract 13 from 100. That should give you 87. Divide that by 100. Since it doesn't reduce down, the answer should be 87/100.

This is all assuming that you're only selecting ONE recorder and will put the recorder back once finished selecting it.
You might be interested in
Find the zeros of the function g(x) = 2x2 - 5x + 2.
sertanlavr [38]
G(x) = 2x² - 5x + 2 = 2x² - 4x - x + 2 = 2x · x - 2x · 2 - 1 · x - 1 · (-2)

= 2x(x - 2) -1(x - 2) = (x - 2)(2x - 1)

g(x) = 0 ⇔ (x - 2)(2x - 1) = 0 ⇔ x - 2 = 0 or 2x - 1 = 0

x = 2 or x = 0.5
8 0
3 years ago
You are starting a lawn mowing business to earn
Sholpan [36]

Answer:

is the question asking how long would it take to make enough? if so the answer is 37 hours

Step-by-step explanation:

500 - 150 = 350

350 ÷ 9.50

=36.8421052632

(round up)

=37 hours

3 0
3 years ago
1. Use the formula S(d)=√9.8d to calculate the estimated speed, in meters per second, of a tsunami if the disturbance occurred a
postnew [5]

Answer: 1. 210 meters per second .

2.  756  kilometers per hour.

Step-by-step explanation:

Given : The formula S(d)=\sqrt{9.8d} to calculate the estimated speed, in meters per second of a tsunami.

1. If the disturbance occurred at an ocean depth of 4,500 meters.

Then put d= 4500 in the above formula , we get

S(d)=\sqrt{9.8\times4500}

S(d)=\sqrt{44100}=\sqrt{21\times21\times10\times10}\\\\=\sqrt{210^2}=210

Hence, if the disturbance occurred at an ocean depth of 4,500 meters , the estimated speed would be 210 meters per second .

Also, A meter per second is equal to 3.6 kilometers per hour.

i.e. 1 meter per second = 3.6 kilometers per hour

Then by unitary method ,

210 meters per second  =3.6\times210 kilometers per hour

=756  kilometers per hour.

3 0
3 years ago
What's 420 seconds to 10 minutes
Neporo4naja [7]
Seventeen (17) minutes!
7 0
3 years ago
In a school of 330 students, 85 of them are in a drama club, 200 of them are in a sports team and 60 of them do both
Neko [114]

Answer:

105/330 = 21/66 = 7/22

7/22 is the answer I think

Step-by-step explanation:

n(U) = 330

n(A) = 85

n(B) = 200

n(A n B) = 60

Now,

n(A U B) = n(A) + n(B) - n(A n B)

or, n(A U B) = 85 + 200 - 60

or, n(A U B) = 285 - 60 = 225

Now,

n(A U B) compliment = n(U) - n(A U B)

n(A U B) compliment = 330 - 225

so, n(A U B) compliment = 105

Now,

probability = 105/330

8 0
2 years ago
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