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artcher [175]
2 years ago
9

The diameter of a circle is 14cm. Which TWO statements are correct? A

Mathematics
1 answer:
Reika [66]2 years ago
3 0

Answer:

(a) and (e)

Step-by-step explanation:

Given

d = 14cm

Required

Select the true statements

First, is a statement about the area.

The area is calculated as:

Area= \pi*\frac{d^2}{4}

So, we have:

Area= 3.14*\frac{14^2}{4}

Area= 3.14*49

(a) is true

Next, is a statement about the circumference.

This is calculated as:

C = \pi d

So, we have:

C = 3.14 * 14

(e) is true

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Irina-Kira [14]

Answer:

Null hypothesis is rejected. Standard deviation is > 8 miles per hour

Step-by-step explanation:

σ [Population standard deviation] = 8 , s [sample standard deviation] = s

n [no of items] = 8

H0 [Null] : σ = 8 ; H1 [Alternate - Right Tail] : σ > 8

χ2 = (n - 1) . s^2 / σ^2

= 49 x (10.5)^2 / 82 = 5402.25 / 64

χ2 = 84.410

df [degree of freedom] = n -1 = 50 - 1 = 49

P value (χ^2 49 > 84.410) = 0.00125

p = 0.0013

p < α ie 0.05

So, H0 is rejected

Hence we state that standard deviation is > 8 miles per hpur

6 0
3 years ago
Geela makes orange paint with 5 parts yellow to
Oxana [17]
Answer:

Geela would need 9 yellow parts


Explanation:

Originally, the Geela needed more yellow than red and the difference was 4 parts.

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2 years ago
What is 5.8×10^6 seconds in minutes?
Wewaii [24]

Answer:

<u>9.66 x 10⁴ minutes</u>

Step-by-step explanation:

To convert seconds into minutes, simply divide by 60.

=> 5.8 x 10⁶ / 60

=> 580 x 10⁴ / 60

=> 29 x 10⁴ / 3

=> <u>9.66 x 10⁴ minutes</u>

3 0
2 years ago
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mariarad [96]
B=3

Hope this helps.
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I’m super confused on 1/3 times 60
inna [77]

Answer:

20

Step-by-step explanation:

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