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2 years ago

11

There were 3,905 more hits on the schools website in January than February. February had 9,854 hits. How many hits did the schoo

ls website have during both months?

1 answer:

Bumek [7]2 years ago

4 0

What you would do here is add so 9,854+3,905=13,759

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Your friend wants to sell painted rocks. He spends $10.00 on startup costs, and each painted rock costs him $0.75 to make. A sto

igomit [66]

Answer:

10 rocks

Step-by-step explanation:

The cost on startup is $10 and each painted rock cost around $0.75 to make. A store pays startup cost and buy painted rocks for $0.75 each there no profit because the cost price and selling price is the same.

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2 years ago

A toy falls from a window 80 feet above the ground. How long does it take the toy to hit the ground?

andrew11 [14]

Answer:

2.24 s

Step-by-step explanation:

Given:

Δy = 80 ft

v₀ = 0 ft/s

a = 32 ft/s²

Find: t

Δy = v₀ t + ½ at²

80 ft = (0 ft/s) t + ½ (32 ft/s²) t²

t = 2.24 s

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2 years ago

Determine which is the appropriate approach for conducting a hypothesis test. Claim: The mean RDA of sodium is 2400mg. Sample da

pshichka [43]

Answer:

c) use the student t- distribution.

t = 22.23

t= 22.23 > 1.645 at 149 degrees of freedom

Null hypothesis is rejected

Step-by-step explanation:

<u>Step (i)</u>:-

Given sample size 'n' =150

The mean RDA of sodium is 2400mg

The mean of the Population 'μ' = 2400mg

Given mean of the sample x⁻ = 3400

The standard deviation of the sample 'S' = 550

<u>Step(ii):</u>-

Null hypothesis :H₀: μ = 2400

Alternative hypothesis : H₁: μ ≠2400

The test of statistic

$t = \frac{x^{-}-mean }{\frac{S}{\sqrt{n} } }$

$t = \frac{3400-2400}{\frac{550}{\sqrt{150} } } = 22.23$

degrees of freedom γ= n-1 = 150 -1 =149

t₀.₉₅ = 1.645

<u>Conclusion:</u>-

t= 22.23 > 1.645 at 149 degrees of freedom

Null hypothesis is rejected

The mean RDA of sodium is not equal to 2400mg

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3 years ago

PLS HELP ME IMA GIBE BRAINLIST AND A LIKE

Blababa [14]

Answer:41.7

Step-by-step explanation:let the unknown percent be x

X\100 of 48=20

X/100 x 48 =20

48x/100= 20

Cross multiply

48x =100 x 20

48x = 2000

Divide both sides by 48

X= 2000/48

X= 41.7

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2 years ago

A construction crew needs to build a road that will be 20 miles long. The crew already completed a stretch that is 6.44 miles lo

fgiga [73]

Answer: 4.94

Step-by-step explanation:

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3 years ago