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Aleks [24]
3 years ago
7

I know I need to use the change of base

Mathematics
1 answer:
Zinaida [17]3 years ago
7 0
The change of base formula looks like this:
                                           log x
(log to the base b of ) x = -----------    (you could also use ln instead of log)
                                            log b

                                                       log 40       1.602
Then (log to the base 7 of) 40 = ------------ = ------------- = 1.896   (answer)
                                                        log 7         0.8451

check (on calculator):    7^1.896 = 40.023   (close enough to 40 to verify 
                                                                     that this method "worked")
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A recent study examined the association between high blood pressure and increased risk of death from cardiovascular disease. The
zalisa [80]
<span>Find the odds of a man with high blood pressure dying from cardiovascular disease. 55 p .0165 3338 = p .0165 .0165 .0168 1 p 1 .0165 .9835

Do the same for a man with low blood pressure. 21 p .0079 2676 = = p .0079 .0079 .00796 1 p 1 .0079 .9921 = = = − − ----->

Calculate the odds ratio with the odds for the high blood pressure group in the numerator. Describe the result in words. HBP LBP odds .0168 odds ratio 2.11 odds .00796 = = = Men with high blood pressure are 2.11 times more likely to die from cardiovascular disease.</span>
7 0
3 years ago
Two vans leave a campground at the
klasskru [66]

Answer:

92 mph

Step-by-step explanation:

Let the speed of the van travelling south  

=

v

mph  

The distance travelled by the car travelling north is

d

1

=

10

⋅

2.5

=

25

The distance travelled by the car travelling south is

d

2

=

v

⋅

2.5

=

2.5

v

The distance between the cars after  

2.5

h

is

d

1

+

d

2

=

255

25

+

2.5

v

=

255

2.5

v

=

255

−

25

=

230

v

=

230

2.5

=

92

mph

The speed is  

=

92

mph

4 0
3 years ago
Follow me on brainy,and what is a+b+z+fg-y+up+f+r=​
pickupchik [31]

Answer:

Sure why not.

Step-by-step explanation:

7 0
3 years ago
What is the area of the trapezoid shown? The figure is not drawn to scale.
guapka [62]

Answer:

284.3

Step-by-step explanation:

Trapezoid Formula:

A=a+b/2*h

plug in the numbers

8 0
2 years ago
Determine the number that will complete the square to solve the equation after the constant term has been written on the right s
klemol [59]

Answer:

Step-by-step explanation:

Hello, "the constant term has been written on the right side", it means that we add 18 to both sides to get.

x^2+3x-18=0\\\\x^2+3x=18\\\\\text{We can see the beginning of } (x+\dfrac{3}{2})^2 \\\\x^2+3x=(x+\dfrac{3}{2})^2-\dfrac{3^3}{2^2}=18\\\\(x+\dfrac{3}{2})^2=18+\dfrac{9}{4}=\dfrac{18*4+9}{4}=\dfrac{81}{4}

Hope this helps.

Thank you.

6 0
3 years ago
Read 2 more answers
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