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3 years ago

Neil's airplane needs a full tank of fuel

Mathematics

2 answers:

givi [52]3 years ago

8 0

Answer:

Neil's airplane needs 3 full tanks of fuel

Step-by-step explanation:

7800 / 2600 = 3 ( tanks of fuel )

Dima020 [189]3 years ago

5 0

Neil's airplane needs 3 full tanks of fuel to travel 7800 miles

Split strategy
2000x2=4000
600x2=1200
4000+1200=5200

5200+2600=7800

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Suppose y varies directly with x, and y= 7 when x = 3. What is the value of x when y = 28? If 7 = k(3) then 28 = k(x) Find x

Rama09 [41]

Let y and x be the numbers that varies directly (that means they keep the same proportion)

Then we have 7y = 3x, OR y/x =7/3 (this ratio should be kept for any value of x and y:
y/x = 7/3, if y = 28, then 28/x = 7/3 or x = (3)(28)/7 = 12

SO X = 12

7 0

3 years ago

Suppose the FAA weighed a random sample of 20 airline passengers during the summer and found their weights to have a sample mean

Orlov [11]

Answer:

Step-by-step explanation:

Given Parameters

Mean, $x$ = 180

total samples, n = 20

Standard dev, $\sigma$ = 30

$\alpha$ = 1 - 0.95 = 0.05 at 95% confidence level

Df = n - 1 = 20 - 1 = 19

Critical Value, $t_\alpha$ , is given by

$t_{c}=t_{\alpha, df} = t_{0.05,19} = 1.729$

a).

Confidence Interval, $\mu$ , is given by the formula

$\mu = x +/- t_c \times \frac{s}{\sqrt{n} }$

$\mu = 180 +/- 1.729 \times \frac{30}{\sqrt{20} }$

$\mu = 180 +/-11.5985$

$191.5985 > \mu > 168.4015$

b).

Critical Value, $t_{\alpha/2}$ , is given by

$t_{c}=t_{\alpha/2, df} = t_{0.05/2,19} = 2.093$

Confidence Interval, $\mu$ , is given by

$\mu = x +/- t_c \times \frac{s}{\sqrt{n} }$

$\mu = 180 +/- 2.093 \times \frac{30}{\sqrt{20} }$

= 180 +/- 14.0403

= 165.9597 < $\mu$ < 194.0403

8 0

3 years ago

A coconut is a fruit that is made up of a hard outer shell that is spherical. Inside, there is a thick layer of coconut meat

Ivenika [448]

Answer: There is room for

approximately 33.49 in^3 of coconut milk.

Step-by-step explanation:

Hi, we have to calculate the volume of milk inside the coconut:

First, we have to find the diameter of that volume that is equal to the diameter of the entire coconut minus the thickness of the coconut meat:

5-1 = 4 in (diameter)

Now, we simply have to apply the next formula:

Volume of a sphere: 4/3 π radius^3

Since: radius = diameter /2

V = 4/3 π (d/2)^3

Replacing with the values given:

V = 4/3 (3.14) ( 4/2)^3 = 33.49 in3

Feel free to ask for more if needed or if you did not understand something.

5 0

3 years ago

You plan to construct a brick wall measuring 15 ft. In length, 6 ft. High. And 1 ft. In width

polet [3.4K]

Idk what the answer is

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3 years ago

I will give Brainiest if you are right

dmitriy555 [2]

Answer:

The answer is $22.75! (A)

Step-by-step explanation:

All you have to do is subtract $36.50 by $13.75 and get the amount of the 2nd piggy bank.

22.75 + 13.75 = 36.50

8 0

3 years ago