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Arturiano [62]
2 years ago
13

Which expression represents B is decreased by 25%?

Mathematics
1 answer:
emmasim [6.3K]2 years ago
3 0

b is decreased by 25% which means there will be (-ve) sign.

<h3>So,</h3>

b - 0.25b

  • <em>Option 5 is correct!!~</em>
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Write -0.5 repeat as a fraction in simplest form
dangina [55]
-5/10 and in simplest form it would be -1/2
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2 years ago
Would you receive any change if you use $200 to buy a book for $9.90, a new television for $179.97, and a new CD for $9.99? What
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You’d receive back exactly 14 cents.
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3 years ago
Suppose you are going to conduct a two tail test concerning the population mean. Suppose that you do not know what the populatio
IRINA_888 [86]

Answer:

The critical value of <em>t</em> at 0.01 level of significance is 2.66.

Step-by-step explanation:

The hypothesis for the two-tailed population mean can be defined as:

<em>H₀</em>: <em>μ </em>= <em>μ₀</em> vs. <em>H₀</em>: <em>μ </em>≠ <em>μ₀</em>

It is provided that the population standard deviation is not known.

Since there is no information about the population standard deviation, we will use a <em>t</em>-test for single mean.

The test statistic is defined as follows:

t_{cal.}=\frac{\bar x-\mu}{s/\sqrt{n}}\sim t_{\alpha/2, (n-1)}

The information given is:

<em>n</em> = 55

<em>α</em> =<em> </em>0.01

Compute the critical value of <em>t</em> as follows:

t_{\alpha/2, (n-1)}= t_{0.01/2, (55-1)}=t_{0.005, 54}=2.66

*Use a <em>t</em>-table for the value.

If the desired degrees of freedom are not provided consider he next highest degree of freedom.

Thus, the critical value of <em>t</em> at 0.01 level of significance is 2.66.

4 0
2 years ago
A box contains four cards: One card is black on both sides, one card is red on both sides and two cards are black on one side an
allochka39001 [22]

Answer:

Step-by-step explanation:

A box contains four cards: One card is black on both sides, one card is red on both sides and two cards are black on one side and red on the other side. One card is selected at random and you can see only one side.i) If the side you see is black, what is the probability that the other side is black?ii) If the side you see is black, what is the probability that the other side is red?

Given that:

Number of cards = 4

x = Black on both sides = 1

y = Red on both sides = 1

z = Black on one side, red on one side = 2

.i) If the side you see is black, what is the probability that the other side is black = b

Probability of black

P(x) = 1/4 ; p(b|x) = 1

P(y) = 1/4 ; p(y|x) =

8 0
2 years ago
Mia works at a smoothie shop. For h hours of work, Mia earns 8h dollars. Last weekend, Mia worked 9 hours.
anastassius [24]

Answer:

72$

Step-by-step explanation:

8h

h=9

8*9=72$

8 0
2 years ago
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