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Luba_88 [7]
3 years ago
9

In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known to be appro

ximately normal with a standard deviation of 12 beats per minute. What is the 99% confidence interval for the mean beats per minute?
Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
7 0
68 - 72!! hope this helps
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A 65-inch HD LCD television is discounted 25% from the original price. If the discounted price is $1799.99, what was the origina
Andreas93 [3]

Answer:

$2399.99

Step-by-step explanation:

the price of the tv is discounted by 25%

that is the same as saying the tv is 75% of its original price

so we take $1799.99/75 to see what one percent of the price is

$1799.99/75=23.9998

then we take 23.9998*100 to see what the original price was

23.9998*100=2399.986667 and then we round to the nearest hundredth

so 2399.99

8 0
2 years ago
Rearrange the quadratic equation so that it is equal to 0 then factor the equation x^2-4x=-2x+24
irinina [24]
X^2-4x=-2x+24
x^2-2x=24
x^2-2x-24=0

(x-6)(x+4)

Proof:
-6+4=-2
-6*4=-24

Final answer: (x-6)(x+4)
4 0
3 years ago
Can I get help with this?
Masteriza [31]

Answer:

AC = 120

Step-by-step explanation:

<D = 360 - 95 - 145

D =120

Central Angle = Intercepted Arc

AC = <D = 120

6 0
3 years ago
I need help with all these questions
Sergio039 [100]
The answer to this question is D and B
8 0
3 years ago
2.6 divided by -0.2
Andrews [41]
Just use a calculator
8 0
3 years ago
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