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3 years ago

Suppose that in a normal half hour of practice, a tennis player expends 280 calories of energy.

Mathematics

1 answer:

sertanlavr [38]3 years ago

4 0

Answer:

308 Calories

Step-by-step explanation:

So we start off with 280 as usual, but I will focus on the percent. The given percent is 110% "effort". What we would need to do here is, Firstly, change the percent into a decimal, and this is done by moving the decimal spot of 110%. What I mean is that 110.% and you move that little period over 2 times to the left and also remove the percent as for now because we will not need it. After that you would get 1.10. This is what we will multiply by. So if we did 280x1.10 it equals 308, and that is how I got 308

Hope this helps!

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The capacity of jose's vase is 2419 milliliters of water. he poured 1 liter 299 milliliters of water into the empty vase. then,

gogolik [260]

One liter is 1,000 ml. plus 299 ml. is 1,299 ml. plus the additonal 398 ml. is 1,697 ml. which is 722 ml. less than the total volume. (722 ml. of water can still be added.)

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4 years ago

A limnologist wishes to estimate the mean phosphate content per unit volume of lake water. It is knownfrom studies in previous y

telo118 [61]

Answer: 68

Step-by-step explanation:

As per given , we have

Population standard deviation : $\sigma=4$

Critical value for 90% confidence interval = $z_{\alpha/2}=1.645$

Margin of error : E= 0.8 milligrams

The formula to find the sample size is given by :-

$n=(\dfrac{z_{\alpha/2}\ \sigma}{E})^2$

i.e. $n=(\dfrac{(1.645)(4)}{0.8})^2=(8.225)^2$

$=67.650625\approx68$

Hence, the limnologist must analyze 68 samples.

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4 years ago

What are zero functions ?

puteri [66]

Answer:

A zero function is a function that is almost everywhere zero.

Step-by-step explanation:

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3 years ago

Read 2 more answers

What is the length of segment GH? Round to the nearest hundredth.

stepan [7]

43.57 hope this helps.

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4 years ago

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E and F are complementary. If m E = 9x - 38 and mF = 2x + 40, find m F pls I need help

larisa86 [58]

Answer:

<h2>m $\angle$ F = 34°</h2>

Step-by-step explanation:

If E and F are complementary I means that the sum of their angles add up to 90° since all complementary angles have the sum of their angles equal to 90°

To find m $\angle$ F add m $\angle$ E and m $\angle$ F and equate it to 90 to find x then substitute it into the expression for m $\angle$ F

Thats

m $\angle$ E + m $\angle$ F = 90

$\rarr$ 9x - 38 + 2x + 40 = 90

$\rarr$ 11x + 2 = 90

$\rarr$ 11x = 90 - 2

$\rarr$ 11x = 88

Divide both sides by 11

x = 8

Now we have

if m $\angle$ F = 9x - 38

m $\angle$ F = 9( 8) - 38

m $\angle$ F = 72 - 38

We have the final answer as

<h3>m $\angle$ F = 34°</h3>

Hope this helps you

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3 years ago