The table below shows the blood types of 75 donors after a one-day blood drive. Based on the results, what is the chance that a random donor has type A blood..?Blood Type- O A B AB
Frequency- 31 33 9 2

Answers

Answer 1

Answer:

Based on the results, the chance that a random donor has type A blood is; 11/25

How to find the Probability?

We are told that there was a survey of 75 blood donors.

Now, we want to find the chance that a random donor has type A blood. From the given table, we see that there are 33 type A blood donors. Thus;

P(donor has type A blood) = 33/75 = 11/25

Read more about Probability at; brainly.com/question/251701

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Answer 2

Answer: What I think the chance that a random donor has type a blood is 44% because there are 33 people in total of 75 that have type A blood type so you simply just divide 33/75 then get .44 which is 44%

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15% 0f ______ is 12?

Answers

you can say : 15/100 = 12/? ⇒ ?=12*100/15 ⇒ ? = 80 so 15% of 80 is 12 :)))
i hope this is helpful
have a nice day

Answer:

Step-by-step explanation:

15% of 80 is 12.

Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a constant rate of 1.5 m/s, how fast is the area of the spill increasing when the radius is 30 m?

Answers

Answer:

The area of the oil spill is increasing at a rate 180 π m²/s, when the radius is 30 m.

Step-by-step explanation:

Derivative Rule:

$(d)/(dx)x^n=nx^(n-1)$
$(d)/(dx)(y^n)=ny^(n-1)(dy)/(dx)$

Given that

The radius of the oil spill increases at a rate 1.5 m/s.

i.e $(dr)/(dt)= 1.5\ m/s$

We need to find the rate of area increase i.e $(dA)/(dt)$ .

We know,

The area of the oil spills A = $\pi r^2$ ( since it spreads in circular pattern)

$\therefore A=\pi r^2$

Differentiating with respect to t

$(dA)/(dt)=\pi. 2r(dr)/(dt)$

Plug the value of $(dr)/(dt) =1.5 \ m/s$

$(dA)/(dt)=\pi. 2r(3\ m/s)$

$\Rightarrow (dA)/(dt)=6\pi r \ m/s$

Plug r= 30 m

$\Rightarrow (dA)/(dt)=6\pi (30\ m) \ m/s$

=180 π m²/s

The area of the oil spill is increasing at a rate 180 π m²/s, when the radius is 30 m.

Work out 5/8 of 10 litres

Answers

5/8 of 10 litres is 6.25 litre
because 5/8=0,625
0,625 * 10 = 6,25 :))

Complete the expansion of this expression by finding the values of the capitalised pronumerals4x (5 + 4y + 3x) + 3y (1 + x) = Ax² + Bx + Cxy + Dy

A=
B=
C=
D=