Find the probability that a point in the circle chosen at random lies in the shaded region

Mathematics

1 answer:

andrew-mc [135]4 years ago

7 0

The chance of a point landing in that region is 12.5%

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Question 3 I'm struggling with what's the answer

Akimi4 [234]

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4 years ago

Why does -2^6 equal -64 but -2 x -2 x -2 x -2 x -2 x -2 equal 64?

user100 [1]

Answer:

Step-by-step explanation:

-2⁶ = -(2⁶) = -(64) = -64

(-2)×(-2)×(-2)×(-2)×(-2)×(-2) = (-2)⁶ = (-1⋅2)⁶ = (-1)⁶⋅2⁶ = 1⁶⋅2⁶ = 64

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3 years ago

When (81x^2/7) (2/9x^3/7) is simplified, it can be written in the form ax^b where a and b are real numbers. Find ab.

larisa86 [58]

Answer:

In improper form your solution will be $\frac{90}{7}$ . As a mixed fraction it will be $12\frac{6}{7}$ .

Step-by-step explanation:

The first thing we want to do here is to simplify this expression. After doing so, " a " and " b " should be multiplied to result in a possible improper fraction,

$\left(81x^{\frac{2}{7}}\right)\:\left(2/9x^{\frac{3}{7}}\right)\:$ - Apply exponential rule " $\:a^b\cdot \:a^c=a^{b+c}$ "

= $81\cdot \frac{2}{9}x^{\frac{2}{7}+\frac{3}{7}}$ - Combine fractions $\frac{2}{7}$ and $\frac{3}{7}$

= $81\cdot \frac{2}{9}x^{\frac{5}{7}}$ - Multiply the fractions, and simplify further

= $\frac{162x^{\frac{5}{7}}}{9}$ = $18x^{\frac{5}{7}}$ - This is out simplified expression

Now that we have this simplified expression, we can see that a = $18$ , and b = $\frac{5}{7}$ . Therefore, multiplying the two we should receive the improper fraction as follows,