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ICE Princess25 [194]
3 years ago
5

Which expression should you simplify to find the 90% confidence interval,

Mathematics
1 answer:
Vlad [161]3 years ago
4 0

Step-by-step explanation:

CI = p ± z √(pq/n)

For 90% confidence, z = 1.645.

CI = 0.55 ± 1.645√(0.55 × 0.45 / 64)

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The sum of two numbers is 200 and the two numbers are in a ratio of 4:6 find the larger number
devlian [24]
X = 1st number
y = 2nd number

x + y = 200
x : y = 4 : 6

ok! let's substitute numbers!

4 * 10 : 6 * 10

40 : 60

40 + 60 = 200

100 ≠ 200

Too small!

That is exactly two times smaller than 200 so let's try 2 times greater than multiplying by 10

4 * 20 : 6 * 20
80 : 120

80 + 120 = 200

200 = 200

Now it says to find the larger number. Which is y.

x :y = 4 : 6 = 80 : 120

so, y is 120

y = 120

Answer : y = 120. The larger number is 120.
3 0
3 years ago
- (4x4- 2x' +7x²+2 x - 1)=(x+3)
Gnom [1K]

Answer:

No solution?

Step-by-step explanation:

Im confused, can you give more information.

4 0
4 years ago
Identify the correct solution to the problem 3 x 9/10
vitfil [10]
Step by step:

3 x 9/10
Turn 3 into a fraction
3/1 x 9/10
Now multiply straight across
3x9=27 and 1x10=10
So you get
27/10 or 27/10 or 2.7

This can also be completed by simply turning 9/10 into a decimal and doing
3 x 0.9 = 2.7
3 0
2 years ago
Can someone please help me
Margaret [11]
Which ones do you need help with?

7 0
3 years ago
Allana used Fraction 3 over 5 yard of fabric to make a scarf. Can she make 2 of these scarves with Fraction 1 and 7 over 10 yard
Paul [167]
(1 7/10) / (3/5)
(17/10) / (3/5) =
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