**Answer:**

A. 4:5

B. 600 girls

**Step-by-step explanation:**

A. g : b = 12 : 15 = **4**** ****:**** ****5**

B. the numbers of girls = 4/(4+5) × 1350

= 4/9 × 1350 = 600

Square root is the same as 1/2 power

If it’s just square root of 2, it would be 2^1/2

If there’s a 3 like in the pic, then that number would go to the top of the power

The answer is 2^3/2

how much money did they start off with?

**Answer:**

y= x-6

**Step-by-step explanation:**

**Answer:**

The answer is 9/11.

**Step-by-step explanation:**

To find the answer you'd first add up how many patients you have:

80+10+20 = 110.

Now find out that how many patients are taking a real drug, which is represented by 80+10 = 90.

So, the probability of a patient NOT getting a placebo is 90/110

Simplified would be 9/11

Thus the answer is 9/11....