Ask question

Ask question

All categories

3 years ago

15

To get ready for the big community bake sale a baker is baking cookies.For his first batch he makes 48 cookies second 78 cookies

third 54 cookies and fourth 68 cookies what is the mean?

1 answer:

mina [271]3 years ago

6 0

Answer:

62

Step-by-step explanation:

To find the mean, add the numbers together and divide the sum by the total amount of numbers.

$\frac{48+78+54+68}{4} =62$

You might be interested in

12x-39<9 and -4x+3<-6

gulaghasi [49]

Remember, you can do anything to an equation as long as you do it to both sides

and when multiply or divide by a negative in inequalities, flip the direction of the sign

12x-39<9
add 39 to both sides
12x<48
divde bothh sides by 12
x<4

-4x+3<-6
minus 3 both sides
-4x<-9
times both sides by -1 and flip sign
4x>9
divide both sides by 4
x>9/4

4 0

4 years ago

Read 2 more answers

A same side interior angle of two parallel lines is three times the other same side interior angle. Find the measures of these t

Charra [1.4K]

Answer:

<em>45 and 135</em>

Step-by-step explanation:

The sum of any interior angles will be 180 so you divide 180 by 4. And you get <em>45</em> then you multiply that by 3 and you get <em>135</em>

5 0

3 years ago

Plz help , due in 5 mins

Grace [21]

Answer:

option a) 30 : 19

Step-by-step explanation:

$Length = 7 \frac{1}{2} = \frac{15}{2}\\\\Width = 4\frac{3}{4} = \frac{19}{4}$

<em><u>Ratio of length to width:</u></em>

$\frac{15}{2} : \frac{19}{4}$ <em><u></u></em>

$=\frac{\frac{15}{2}}{\frac{19}{4}}\\\\=\frac{15}{2 } \times \frac{4}{19}\\\\=15\times \frac{2}{19}\\\\=\frac{30}{19}\\\\30 : 19$

3 0

3 years ago

Two hundred undergraduate students were randomly selected from a university that has 47,000 students in total. Systolic blood pr

Hoochie [10]

Answer:

The correct option is d

Step-by-step explanation:

From the question we are told that

The population size is $N = 47000$

The sample size is $n = 200$

The sample mean is $\= x = 118.0 \ mmHg$

The standard deviation is $\sigma = 11.0 \ mmHg$

Given that the confidence level is 95% then the level of significance can be calculated as

$\alpha = 100 - 95$

$\alpha = 5 \%$

$\alpha = 0.05$

Next we obtain the critical value of $\frac{\alpha }{2}$ from z-table , the value is $Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 1.96$

The reason we are obtaining critical value of $\frac{\alpha }{2}$ instead of $\alpha$ is because

$\alpha$ represents the area under the normal curve where the confidence level interval ( $1-\alpha$ ) did not cover which include both the left and right tail while

$\frac{\alpha }{2}$ is just the area of one tail which what we required to calculate the margin of error .

NOTE: We can also obtain the value using critical value calculator (math dot armstrong dot edu)

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } *\frac{\sigma }{ \sqrt{n} }$

substituting values

$E = 1.96 *\frac{11.0 }{ \sqrt{200} }$

$E = 1.5245$

The 95% confidence level interval is mathematically represented as

$\= x - E < \mu < \= x + E$

substituting values

$118.0 - 1.5245 < \mu < 118.0 + 1.5245$

$116.5< \mu < 119.5$

$[116.5 , 119.5]$

6 0

3 years ago

Mallory works 20 hours a week as a website designer and earns $42.50 per hour. If Mallory saves

AleksandrR [38]

If Mallory makes $42.50 per hour and she works 20 hours a week, we multiple those two and we get:

42.5 * 20 = 850

So she earns $850 per week.

Mallory saves half of that amount she would have $425 per week.

In 4 weeks she would have:

425 * 4 = 1700

Mallory will save $1,700 in four weeks.

3 0

3 years ago

Read 2 more answers