If you put the Pi key into the calculator instead of 3.14 will you get a different answer or the same answer you get using either one? If that makes sense

The length of Line BC is 10

What is a triangle?

A figure bounded by 3 sides and all the internal angles add up to 180 ° is called a triangle.

What are similar triangles?

Triangles having the same corresponding angles measures and proportional side lengths are called similar triangles.

How to find the length of the line BC?

Considering Δ AXY    and    ΔABC

                      ∠AXY       =      ∠ACB  (corresponding angles are equal)

                       ∠AYX       =      ∠ABC   (corresponding angles are equal)

                       ∠A is common in both the triangles

∴ We can say the triangles are similar .

Now, let H be the height of ΔABC and h be the height of ΔAYX

So, we can say,  

• Now, we know that area of the triangle can be found with the help of the formula (1/2)x(base)x(height)

So,  

⇒    

Now, substituting XY = 5 and    in the above equation, we get

⇒ BC² = 100

⇒ BC = ± 10

Since BC is the length , so it cannot be negative.

So, the negative value is rejected.

∴  BC = 10

Option B is correct.

Find more about "Similar Triangles" here: brainly.com/question/2644832

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The product rule for exponents allows you to add the exponents together when multiplying numbers with the same base. In the example, 10⁻⁵ · 10⁴ · 10⁸, you added -5, 4 and 8 to get 10⁷. This rule is useful in scientific notation for simplifying multiplication.

The product rule for exponents states that for any base (in your case it's 10), the product of two exponents with the same base equals to the base raised to the sum of the exponents. Essentially, you just add the exponents together. If you have 10⁻⁵, 10⁴, and 10⁸, you simply find your answer by doing 10⁻⁵⁺⁴⁺⁸. This is equal to 10⁷, so your initial calculation was correct. An example of this rule can be seen with smaller numbers. If you take 5² (equal to 5x5 which equals 25) and multiply it by 5³ (equal to 5x5x5 which equals 125), using the product rule of exponents, you would add 2 and 3 (the exponents) to get 5⁵ (equal to 3125). To further apply this rule, you could have scientific notation; for multiplying two numbers represented in this system (like 3 × 10⁵ and 2 × 10⁰) you multiply the coefficients (3 and 2) and combine it with 10 raised to the sum of the exponents.

For more about Product Rule for Exponents:

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Answer:The exponent "product rule" tells us that, when multiplying two powers that have the same base, you can add the exponents. In this example, you can see how it works. Adding the exponents is just a short cut! The "power rule" tells us that to raise a power to a power, just multiply the exponents

Step-by-step explanation:

Answer:

c > 9/4

Step-by-step explanation:

No real solutions;

B² - 4AC < 0

3² - 4(1)(C) < 0

9 - 4C < 0

4C > 9

C > 9/4

Answer:

40.8

Step-by-step explanation:

4.8 is 10% so 2.4 is 5%

so 7.2 is 15%

so 48-7.2= Simon's water bill in September=40.8

Answer:

Negative three eighths.  

Step-by-step explanation:

Our given expression is ÷

To simplify (or, solve), use

P parenthesis

E exponents

M multiplication

D division

A addition

S subtraction

We see first that there are no parenthesis. Skip this part.

Next up is exponents. 1/2 cubed is 0.125, or 1/8.

We see now that there is no multiplication. Skip this part.

Now, we do division. -4 ÷ = -1/2.

No addition is in this expression. Skip this part.

Finally, we subtract. We are left with 1/8 - 1/2 = -0.375, or -3/8.