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2 years ago

27 is what percent of 18.75?

Mathematics

1 answer:

AnnZ [28]2 years ago

7 0

Answer:

144

Step-by-step explanation:

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3 years ago

What is an algebraic expression for the number of hours in "m" minutes

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A certain test preparation course is designed to help students improve their scores on the GRE exam. A mock exam is given at the

Westkost [7]

Answer:

(0.25 ; 21.75)

8.7 (1 decimal place)

Step-by-step explanation:

Net change in scores : X = 6,14,12,23,0

Sample mean, xbar = (6 + 14 + 12 + 23 + 0) /5 = 55 /5 = 11

Sample standard deviation, s = 8.66 ( from calculator)

Sample standard deviation = 8.7( 1 decimal place)

Sample size, n = 5

The 95% confidence interval; we use t, because n is small

Tcritical at 95%, df = 4 - 1 = 3 ; Tcritical = 2.776

Xbar ± standard Error

Standard Error = Tcritical * s/√n

Standard Error = 2.776 * 8.66/√5

Standard Error = 10.751086 = 10.75

Lower boundary = (11 - 10.75) = 0.25

Upper boundary = (11 + 10.75) = 21.75

(0.25 ; 21.75)

The

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2 years ago

QUAL A ÁREA, EM CENTÍMETROS QUADRADOS, DA FIGURA AO LADO?

Ratling [72]

Answer:

Step-by-step explanation:

Dado:

Considere o quadrilátero como trapézio, então nós temos

soma dos lados paralelos = 13+22

altura = 12

Encontrar:

área de trapézio = ?

Solução:

Considere o quadrilátero como trapézio, então nós temos

$\textrm{área de trapézio}=\frac{1}{2}\times \textrm{soma dos lados paralelos}\times altura\\=\frac{1}{2}\times (13+22)\times 12\\=210\ centímetros quadrados$

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2 years ago