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3 years ago

Please help, will mark brainiest. 20+ POINTS

Mathematics

1 answer:

professor190 [17]3 years ago

4 0

Answer:

2.5•2 = 5

Step-by-step explanation:

The resulting two-dimensional cross-section is the area of a square.

Area of a square is equal to:

$A=bh$

Having

$b = 2.5\ in\\h = 2\ in$

<u>substitute</u>

$A=2.5*2=5\ in^{2}$

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Parallel, orthogonal, or neither.

zzz [600]

Vectors are orthogonal, when dot product $u\cdot v=0$

$u\cdot v=\langle-1,3\rangle\cdot\langle-9,-3\rangle=(-1)\cdot(-9)+3\cdot(-3)=9-9=0$

Vectors $u$ and $v$ are orthogonal.

8 0

3 years ago

According to a human modeling project, the distribution of foot lengths of women is approximately Normal with a mean of 23.4 ce

stiv31 [10]

Answer: 22.0.6%

Step-by-step explanation:

Given : According to a human modeling project, the distribution of foot lengths of women is approximately Normal with $\mu=23.3\ cm$ and $\sigma=1.3\ cm$ .

In the United States, a woman's shoe size of 6 fits feet that are 22.4 centimeters long.

Then, the probability that women in the United States will wear a size 6 or smaller :-

$P(x\leq22.4)=P(z\leq\dfrac{22.4-23.4}{1.3})\ \ [\because z=\dfrac{x-\mu}{\sigma}]\\\\\approx P(z\leq-0.77)\\\\=1-P(z\leq0.77)\\\\=1-0.77935=0.2206499\approx0.2206=22.06\%$

Hence, the required answer = 22.0.6%

4 0

3 years ago

Ivan sold 31 boxes of oranges on Friday and 29 boxes on Saturday during a citrus sale. There were 10 oranges in each box. How ma

ycow [4]

Answer:

600

Step-by-step explanation:

31 plus 29 is 60

60 x 10 = 600

7 0

3 years ago

50% of A is equal to $120 and 120% of B is equal to $90

Artemon [7]

What do u want to know?
A x 50% = $ 120
B x 120% = $ 90

5 0

3 years ago

Read 2 more answers

The measure ∠BQS of is 80°. What is the m∠NQS? 42° 48° 128° 32°

fomenos

Answer:

m<NQS = 32°

Step-by-step explanation:

Given:

m<BQS = 80°

m<BQN = 48°

Required:

m<NQS

SOLUTION:

Angle BQN and angle NQS are adjacent angles having a common line, QN, and a common corner point, Q.

Therefore:

m<BQN + m<NQS = m<BQS (angle addition postulate)

48° + m<NQS = 80° (substitution)

m<NQS = 80 - 48° (Subtraction of 48 from each side)

m<NQS = 32°

3 0

3 years ago

Read 2 more answers