Ask question

Ask question

All categories

Zigmanuir [339]

3 years ago

12

I need help on this question? Can you please show the working out

2 answers:

snow_tiger [21]3 years ago

6 0

Answer:

2×5=1000000000

Step-by-step explanation:

1000000000

MAXImum [283]3 years ago

5 0

You need to use pythagorean theorem to figure out BD as you need the height of the triangles to figure out the area. to figure out the area of a triangle the formula is: area of triangle = 1/2 x base x height
i don’t know if you’re supposed to change the values they give you into numbers but i’m changing them
2 √ 5 = 4.47 cm
3 √ 2 = 4.24 cm
√ 2 = 1.41 cm

using pythagorus to work out BD
BD² = 4.47 ² - 4.24 ²
BD² = 2.0033
BD = √2.0033
BD = 1.42 cm

to figure out area of triangle ABD
1/2 x 4.24 x 1.42 = 3.0104 cm ²

area of BDC
1/2 x 1.41 x 1.42 = 1.0011 cm ²

total area of triangle
3.0104 + 1.0011 = 4.0115 cm ²

my answer may differ from the actual answer as the rounding will be different. i recommend you just follow my working out and but not round your numbers at the end of each step to get a more accurate answer

You might be interested in

Evaluate <br> a<br> +<br> 4<br> a+4a, plus, 4 when <br> a<br> =<br> 7<br> a=7a, equals, 7.

Scilla [17]

<em>When evaluating $a=7$ then we get that the expression is 11</em>

<h2>Explanation:</h2>

As I understand the expression is the following:

$a+4$

Let's call, that expression as $E$

So we are asked to find the value of the expression when $a=7$ . In other words, we need to substitute $a=7$ , so:

$E(7)=(7)+4 \\ \\ E(7)=11$

So <em>when evaluating $a=7$ then we get that the expression is 11</em>

<h2>Learn more:</h2>

Distributive property: brainly.com/question/10794694

#LarnWithBrainly

4 0

4 years ago

Answer my question<br> Please I need it right away

lana66690 [7]

Answer:

the mean of the data is 13, so the result is given by the sum of all data (11+12+13+14+15) and divided by 5

3 0

3 years ago

Solve for x: 6/x = 4/8

Nuetrik [128]

Answer: x = 12

Step-by-step explanation:

$\frac{6}{x}$ = $\frac{4}{8}$

cross multiply

4x = 6 × 8

4x = 48

divide through by 4

x = 12

7 0

4 years ago

Do I subtract 32 from both sides? or do I subtract 15 from both sides?

Dmitry_Shevchenko [17]

You subtract 32 from
Both sides

5 0

3 years ago

Suppose the probability of an athlete taking a certain illegal steroid is 10%. A test has been developed to detect this type of

Travka [436]

Answer:

93.25% probability that they have taken this steroid

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

$P(B|A) = \frac{P(B)*P(A|B)}{P(A)}$

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Positive test

Event B: Taking the steroid.

Suppose the probability of an athlete taking a certain illegal steroid is 10%.

This means that $P(B) = 0.1$

Given that the athlete has taken this steroid, the probability of a positive test result is 0.995.

This means that $P(A|B) = 0.995$

Positive test:

99.5% of 10%(If the athlete has taken).

100-99.2 = 0.8% of 100-10 = 90%(Athlete has not taken)

Then

$P(B) = 0.995*0.1 + 0.008*0.9 = 0.1067$

Given that a positive test result has been observed for an athlete, what is the probability that they have taken this steroid

$P(B|A) = \frac{P(B)*P(A|B)}{P(A)} = \frac{0.1*0.995}{0.1067} = 0.9325$

93.25% probability that they have taken this steroid

4 0

3 years ago