3 years ago

A science club at Emily's middle school has 25 members. Only 40% of the

Mathematics

1 answer:

kirill [66]3 years ago

7 0

Answer:

they re 9 members dat came

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To convert 25 hours to minutes would you use the ratio 1/60

kodGreya [7K]

Answer:

Yes

Step-by-step explanation:

1 hour = 60 min

25 hours = 60 x 25 min

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2 years ago

A birthday celebration meal is $46.80 including tax, but not the tip. find the total cost if a 10% tip is added to the cost of

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$51.48 should be the answer

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3 years ago

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Step-by-step explanation:

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2 years ago

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(x-9)(x+2) <br> see if u can find it

ycow [4]

Answer:

x^2 -7x-18

Step-by-step explanation:

(x-9)(x+2)

FOIL

first x*x = x^2

outer 2x

inner -9x

last -9*2 =-18

Add together

x^2 +2x-9x-18

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x^2 -7x-18

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2 years ago

A college professor never finishes his lecture before the end of the hour and always finishes his lectures within 2 min after th

Citrus2011 [14]

Answer:

Value of k is $\displaystyle\frac{3}{8}$

Step-by-step explanation:

We are given the following information in the question:

$f(x) = kx^2, 0\leq x \leq 2\\~~~~~~~= 0, \text{ otherwise}$

where x is the time elapses between the end of the hour and the end of the lecture.

We have to find the values of k.

Since, f(x) is the pdf, then,

$\displaystyle\int^\infty_{-\infty} f(x) = 1\\\\\displaystyle\int^2_{0} f(x) = 1\\\\\displaystyle\int^2_{0} kx^2 = 1\\\\k\bigg[\frac{x^3}{3}\bigg]^2_0 = 1\\\\k\times \frac{8}{3} = 1\\\\k = \frac{3}{8}$

Hence, value of k is $\displaystyle\frac{3}{8}$

4 0

2 years ago