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olga55 [171]
2 years ago
10

How many 10 kobo coins are there in #9.90?

Mathematics
1 answer:
baherus [9]2 years ago
4 0

Answer:

99

Step-by-step explanation:

1₦ = 100 k

₦9.90 =?

=990k

990/10=99

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5d = 30 i cant find the answer
TEA [102]

Answer:

d=6

Step-by-step explanation:

divide 30 by 5 to get the value of d

5 0
3 years ago
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7=3/8x-2<br> What is the answer show your work
Marina CMI [18]

Answer:

x = 24

Step-by-step explanation:

Firstly, isolate x by adding 2 to both sides.

9 = 3/8x

Then, multiply 8 to both sides.

72 = 3x

Then, divide both sides by 3.

24 = x

4 0
3 years ago
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A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
<span>

Part B:

The mean of a binomial distribution is given by

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
The standard deviation is given by:

</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
<span>

Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
5 0
3 years ago
7x9=7x5+7x= <br> Please help i’m on a test
mariarad [96]
I can’t see the photo sorry
7 0
3 years ago
What does N equal?Please use the Pythagorean Theorem for this question.
mart [117]

Answer:

55

Step-by-step explanation:

a squared plus b squared = c squared

48 squared= 2304

73 squared= 5329

5329 - 2304= 3025

the square root of 3025 is 55 :))

7 0
3 years ago
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