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Ainat [17]
3 years ago
12

Each side of a square is increasing at a rate of 4 cm/s. at what rate is the area of the square increasing when the area of the

square is 16 cm2?
Mathematics
1 answer:
Iteru [2.4K]3 years ago
7 0
Confusing question but I would get 0, as if you have 4cm, that squared = 16cm^2. Therefore if it were increasing anymore, then you would not be able to get a value of 16.
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A 90% confidence interval for the mean height of students
Westkost [7]

Answer:

ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean \mu is given by this formula:

\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}

The confidence level on this case is 0.9 and the significance \alpha=1-0.9=0.1

The confidence interval calculated on this case is 60.128 \leq \mu \leq 69.397

The margin of error for this confidence interval is given by:

ME =t_{\alpha/2} \frac{s}{\sqrt{n}}

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

ME = \frac{Upper -Lower}{2}

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635

And the best answer on this case would be:

b) m = 4.635

4 0
3 years ago
- 4 x + 9 = 21 x=___ help
faust18 [17]
X=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3
4 0
2 years ago
Read 2 more answers
What is the value of the expression 9 + (fraction 1 over 2)4 ⋅ 48?
lyudmila [28]

Answer -> (12) I'm very late haha but hopes this helps!

3 0
3 years ago
Sonny substituted 5 for x in the proportion 16/x=48/15 and cross multiplied to get 240=240. Why is this?
Mashutka [201]
Because 16/5 and 48/15 are equivalent fractions
7 0
3 years ago
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Where does the line y=x-1 cross the y-axis?
konstantin123 [22]
<h3>✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽</h3>

➷ It would cross at (0, -1) or just -1

y = mx + c

The 'c' value in the equation is the y intercept

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

7 0
3 years ago
Read 2 more answers
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