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leonid [27]
3 years ago
10

In Kayla's grade, 3/4 of the students have a sister. Of the students who have a sister, 2/5

Mathematics
1 answer:
ioda3 years ago
4 0

Answer:brother? Simplify your answer and write it as a fraction or as a whole or mixed number.

Step-by-step explanation:

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The FDA is testing a new ointment designed to deliver 3.5 micrograms of active ingredient to each square centimeter of skin. Nin
lions [1.4K]

Answer:

t(c)  =  3.355

Step-by-step explanation:

We assume a normal distribution, and with sample size n = 9 we should follow a t -student test on both tails since the FDA is interested in determining if the amount of drug absorbed is different from 3.5 micrograms.

Therefore if α  = 0,01    that means that confidence interval is 99 % or 0,99

Finally with   α/2 = 0,005   and 8 degrees of freedom we find in t-student table  t(c)  =  3.355

8 0
3 years ago
What is the answer to this question
Marat540 [252]

Answer:

48 units

Step-by-step explanation:

4 0
3 years ago
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A right triangle in which one acute angle is a reference angle for a 75° angle in standard position intersects the unit circle a
vampirchik [111]

Alright, lets get started.

Please take a look at the diagram attached.

The reference angle of 75 will be 75

As it is mentioned that the angle intersects the unit circle means r = 1

So, finding cos

cos 75 = \frac{X}{r}

cos 75 = \frac{0.259}{1}

cos 75 = 0.259    :   Answer

Hope it will help :)


7 0
3 years ago
Help pls!!!!! Brainliest goes to first right answer
zepelin [54]

Answer:

96 inch²

Step-by-step explanation:

there are 2 shapes,

1. a square

2. a triangle

lets find the area of the square first,

<u>AREA = SIDE × SIDE</u>

= 8 × 8

= 64 inch²

now, area of triangle ,

area \:  =  \frac{1}{2}  \times base \:  \times height \:

=  \frac{1}{2}  \times 8 \times 8 \\  =  \frac{1}{2}  \times 64 \\  = 32 \:  {inch}^{2}

so, total area is :

area of square + area of triangle

= 64 + 32

= 96 inch²

7 0
3 years ago
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Betsy is collecting coins she has 25quarters 3times as many nickels than quarters and2times as many pennies than nickels how man
babunello [35]
YEAH I CAN TELL YOU A LAME LOL
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3 years ago
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