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Diano4ka-milaya [45]
3 years ago
11

Help me please !

Mathematics
2 answers:
Strike441 [17]3 years ago
8 0
You take the mean of 12.89 from marcus' score od 13.7  to get .81, then divide that by the standard deviation of 1.95. This gives you .415 and thats 65.9% on the z table. In the summary tell him he only scored better than 65.9% of students or average.
scoray [572]3 years ago
6 0
Marcus score is 13.7, the mean is 12.89, and the standard deviation is 1.95, so I’ll do ( 13.7 – 12.89)/ 1.95, Since Marcus' z-score is 0.415. The area to the left of the z-score is 65.9% so therefore Marcus did scored better than 65.9% of the students. So Marcus needs to score 98% better of all the other students in order for him to receive an actual certificate.
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A pole, 4m high, stands, vertically, on
Lostsunrise [7]

Answer:

Length of the shadow of the pole is 6.93 metres

Step-by-step explanation:

Given:

Height of the pole = 4 m

The angle sun makes with the horizontal = 30 degrees

To Find:

Length of the shadow of the pole = ?

Solution:

The tangent ratio is the value received when the length of the side opposite of angle theta is divided by the length of the side adjacent to angle theta

Let x be the length of the shadow

According to the tangent ratio

tan {\theta} = \frac{opposite}{adjacent}

On substituting the values,

ta( {30^{o}) = \frac{4}{x}

x  = \frac{4}{tan ({30^{o})}}

x =\frac{4}{0.57735027}

x  = 6.93 m

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3 years ago
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Steve is choosing between two jobs at Smithsonian museums. One job is funded through the federal government and offers a pension
lora16 [44]
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the city park department is planning to enclose a play aea. one side of the area will be against an existing building, so no fen
SVEN [57.7K]

Answer:

length = 200 m

width = 400 m

Step-by-step explanation:

Let the length of the plaing area is L and the width of the playing area is W.

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Differentiate with respect to L.

dA/dL = 800 - 4 L

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800 - 4 L = 0

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So, the area is maximum if the length is 200 m and the width is 400 m.

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3 years ago
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