A medical researcher designs a study that will investigate the effects of a

Mathematics

1 answer:

kakasveta [241]3 years ago

4 0

Answer:

Step-by-step explanation:

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It takes Audrey 3/5 hour to paint 2/5 square yards of wood to be used for making shelves. How many square yards can she paint in

ivanzaharov [21]

This is how I would do it;

Convert to minutes 3/5 *60 = 36
Convert this to decimal 2/5 = 0.4

Then;

if it takes 36 mnts to paint 0.4yd^
in 60 mnts x yd^
___________________

60 x 0.4 / 36 = 0.66666667

convert back to fraction = 2/3 yd^ in 1hr

5 0

3 years ago

What is the probability of rolling a 3 on a 6-sided number cube and then NOT rolling a 3 on a 6-sided number cube?

yarga [219]

Do determine the probability of two events occurring in sequence, multiply the probability of each event against the other.

There's a 1 in 6 chance of rolling a 3 on a 6-sided number cube; there's a 5 in 6 chance of rolling not-a-3 on a 6-sided number cube; thus, the chance of rolling a 3 that is immediately followed by a not-3 is:

(1/6) times (5/6) = (5/36)

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3 years ago

How can you use 10% and 20% of an amount to find 15% of anl amount?

beks73 [17]

You just need to know how much 10% is and then you just divided what 10% is and that will be equal to 5% and then you just add the 10 % and 5%

3 0

3 years ago

What multiplies to 24 and adds to 20

lions [1.4K]

There are no factors.

1*24
2*12
3*8
4*6

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3 years ago

A hiker in Africa discovers a skull that contains 32% of its original amount of C-14. find the age of the skull.

ziro4ka [17]

Answer:

9419.3 years.

Step-by-step explanation:

Let the initial amount of C-14 be 100 units.

We have been given that a hiker in Africa discovers a skull that contains 32% of its original amount of C-14. We are asked to find the age of the skull.

We will use half life formula to solve our given problem.

$A=a\cdot(\frac{1}{2})^{\frac{t}{h}}$ , where,