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3 years ago

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Mathematics

2 answers:

Sladkaya [172]3 years ago

5 0

Answer:

Triangle

Solve for area

A=hbb

Step-by-step explanation:

Hope this helps^v^

yarga [219]3 years ago

5 0

Answer:

mm..yea i dont kno

Step-by-step explanation:

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PLZ PLZ PLZ help me with this question

aalyn [17]

The price would be $42.

3 0

3 years ago

Read 2 more answers

Suppose that you want to estimate the mean pH of rainfalls in an area that suffers from heavy pollution due to the discharge of

labwork [276]

Answer:

The number of rainfalls is $n =96$

The answer to the second question is no it will not be valid this because from the question we are told that the experiment require one pH reading per rainfall so getting multiply specimens(used for the pH reading) from one rainfall will make the experiment invalid.

Step-by-step explanation:

from the question we are told that

The standard deviation is $\sigma = 0.5$

The margin of error is $E = 0.1$

Given that the confidence level is 95% then we can evaluate the level of significance as

$\alpha = 100 - 95$

$\alpha = 5 \%$

$\alpha =0.05$

Next we will obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table , the value is $Z_{\frac{\alpha }{2} } = 1.96$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} * \sigma }}{ E} ]^2$

substituting values

$n = [\frac{1.96 * 0.5 }{ 0.1} ]^2$

$n =96$

The answer to the second question is no the validity is null this because from the question we are told that the experiment require one pH reading per rainfall so getting multiply specimens(used for the pH reading) from one rainfall will make the experiment invalid

5 0

4 years ago

Jake, a full -grown iguana, costs $350.00. Maggie, a boa constrictor, costs $239, and Buster, a land tortoise, is $375. What is

erma4kov [3.2K]

Answer:

$964

Step-by-step explanation:

Simply add the values of these 3 animals:

Total = $350 + $239 + $375

Total = $725 + $239 = $964

4 0

3 years ago

Last year it rained on 63 days in mudville. there were 7 times as many days of rain in mudville as in detest hills. how many day

atroni [7]

Start by creating a linear equation based on the information given:
63=7x
Now, divide 7 from both sides to get x by itself.
(63/7)=(7/7)x
9=x

Thus, it rained 9 days in desert hills.

7 0

3 years ago

Solve for x: (5x + 9) (8x - 30)

Alik [6]

Answer:

112x-420

Step-by-step explanation:

(5x + 9) (8x - 30)

distribute 5x into (8x-30)

then same with 9 into (8x-30)

then combine like terms and u will get da answer

hope this helps with da pic dat i attach

Download docx

4 0

3 years ago