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borishaifa [10]
3 years ago
8

20 pts!!! What is the surface area of the pyramid?

Mathematics
1 answer:
dexar [7]3 years ago
3 0

Answer:

A≈99.33

Step-by-step explanation:

=lw+l(w

2)2+h2+w(l

2)2+h2=5·5+5·(5

2)2+72+5·(5

2)2+72≈99.33034

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If x=2 and y=5, evaluate the following expression: 2(x+y)
astraxan [27]

Answer:

2(x+y)

x=2 and y=5

2x+2y

Subs

2(2)+2(5)

4+10=14

6 0
2 years ago
Read 2 more answers
Use a calculator to work out: (1dp) 2.3 x 6.82 -------------- 7.74 - 1.09 that is a fraction by the way
Arte-miy333 [17]

Answer:

2.3588

Step-by-step explanation:

Assuming your problem is: \frac{2.3(6.82)}{7.74-1.09}

We multiply the top and subtract the bottom, then divide the results together in the calc.

<em>Rounded to 1 decimal place: </em><em>2.4</em>

6 0
3 years ago
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Please help it’s due tonight<br><br> Math
gayaneshka [121]

Answer:

m < 36

yes, Jamie is correct.

Step-by-step explanation:

I've bolded the statements that you can put down to show your work

the maximum that Jamie is willing to practice for the week is 300 minutes, so you can start by creating an inequality for that.

total minutes throughout the week < 300

next, you know that a week is monday through friday + the weekend, and the amount of minutes Jamie will practice for the weekend is already given.

so, you can rewrite the earlier inequality like so

Monday through Friday practice + 120 < 300

since Jamie plans to practice the same amount of time (m) for each day, and there are 5 days between monday and friday, you can substitute values in the equation

5m + 120 < 300

simplify

5m < 300 - 120

5m < 180

m < 36

since half an hour is 30 minutes, the answer is yes, Jamie's claim is correct.

5 0
2 years ago
I NEED HELP PLS!!!! I DONT UNDERSTAND THIS!! PLS TELL ME THE CORRECT ANSWER AND HOW YOU GOT IT STEP BY STEP!!!!
padilas [110]
I like to start with changing fractions to decimals. It seems easier that way.
5/8 = 0.625 cups

Now divide 4 by 0.625
4 / 0.625 = 6.4

Noor can offer 6 cups with an extra 2/5 of a cup left. He can offer the 2/5 of a cup to a friend, so he can offer 7 friends some hot chocolate!

5 0
3 years ago
Brand name producers of aspirin claim that one advantage of their aspirin over generic aspirin is that brand name aspirin is muc
11Alexandr11 [23.1K]

Answer:

Step-by-step explanation:

The claim here is that the brand name aspirin is more consistent in the amount of active ingredient used than the generic aspirin.

This is a test of 2 independent groups. The population standard deviations are not known. Let μ1 be the mean amount of active ingredients in brand name aspirin and μ2 be the mean amount of active ingredients in generic name aspirin

The random variable is μ1 - μ2 = difference in the mean amount of active ingredients between the brand name and generic aspirin

We would set up the hypothesis.

The null hypothesis is

H0 : μ1 ≥ μ2 H0 : μ1 - μ2 ≥ 0

The alternative hypothesis is

H1 : μ1 < μ2 H1 : μ1 - μ2 < 0

This is a left tailed test

Since sample standard deviation is known, we would determine the test statistic by using the t test. The formula is

(x1 - x2)/√(s1²/n1 + s2²/n2)

From the information given,

x1 = 325.01

x2 = 323.47

s1 = 10.12

s2 = 11.43

n1 = 200

n2 = 180

t = (325.01 - 323.47)/√(10.12²/200 + 11.43²/180)

t = 1.24

1.237877

The formula for determining the degree of freedom is

df = [s1²/n1 + s2²/n2]²/(1/n1 - 1)(s1²/n1)² + (1/n2 - 1)(s2²/n2)²

df = [10.12²/200 + 11.43²/180]²/[(1/200 - 1)(10.12²/200)² + (1/180 - 1)(11.43²/180)²] = 1.53233946713/0.00537245359

df = 285

We would determine the probability value from the t test calculator. It becomes

p value = 0.108

Since alpha, 0.025 < than the p value, 0.108, then we would fail to reject the null hypothesis. Therefore, at 2.5% level of significance, these data support the brand name producers claim

5 0
3 years ago
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