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3 years ago

Were there more people that were under 20 or 20 and over ? A.under 20 B.20 and over

Mathematics

2 answers:

frutty [35]3 years ago

6 0

The answer would be B

slega [8]3 years ago

3 0

Answer:

it's A, under 20

Step-by-step explanation:

if you add 15 to 45 you get 60, 30 plus 60 is 90, completing that side of the chart.

then, add 9 to 45 to get 54. there are 54 people under 20, and there are 36 people over 20. so the answer is A, there are more people under 20.

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Consider a multiple choice exam with 10 questions, and with 4 possible answers to each question (labeled A, B, C, and D). 1a. Wh

mrs_skeptik [129]

Answer:

(1a) 9.54e-07 (1b) 0.9437 (2) $10^8$

Step-by-step explanation:

We have n = 10 questions. For each question in the multiple choice exam, we can choose the correct answer with probability p = 0.25 or an incorrect answer with probability q = 0.75 (just by guessing). Besides is reasonable to believe that questions are independent. Let X be the random variable that represents the number of correct answers (just by guessing) observed during the n = 10 questions, so, X have a binomial distribution.

(a) The probability of getting a perfect score just by guessing is

$P(X = 10) = 10C10(0.25)^{10}(0.75)^{10-10} = 9.54e-07$

(b) The probability of getting at least one question correct, just by guessing

$P(X\geq1) = \sum_{x=1}^{x=10}10Cx(0.25)^{x}(0.75)^{(10-x)} = 0.9437$

2. Each RUID is 9-digits long, there are 10 digits, each of the nine positions for a digit of the RUID has 10 posibilities except the 4th and 5th positions which must be both 0. For the multiplication rule there can be $(10)^3(1)(1)(10)^5 = 10^8$ different RUIDS.

3 0

3 years ago

Michael bought 160 hotdogs were eating competition he spends $240 an hour how much did each hotdog cost

geniusboy [140]

Answer:

$1.50

Step-by-step explanation:

1. we know that its $240 per 160 hot dogs

2. make that a ratio - 240:160

3. simplify the ratio so that the amount of hot dogs is at one (so divide both sides by 160)

4. so 240/160 = 1.5 . 160/160 = 1

5. 1.5:1

6. so for every one hotdog, you pay $1.50

4 0

3 years ago

the length of a rectangle is 6in.more than than its width .Its area is 50 sq.in Find the width of the rectangle....

yulyashka [42]

L=6+W
A=LW
sub 6+W for L
A=(6+W)(W)
expand
oh, A=50
50=W²+6W
minus 50 both sides
0=W²+6W-50
we gots to use quadratic formula
for
aW²+bW+c=0
W= $\frac{-b+/- \sqrt{b^2-4ac} }{2a}$
we got
a=1
b=6
c=-50

W= $\frac{-(6)+/- \sqrt{(6)^2-4(1)(-50)} }{2(1)}$
W= $\frac{-6+/- \sqrt{36+200} }{2}$
W= $\frac{-6+/- \sqrt{236} }{2}$
W= $\frac{-6+/- 2\sqrt{59} }{2}$
W= $-3+/- \sqrt{59}$

W= $-3+ \sqrt{59}$ or W= $-3- \sqrt{59}$
aprox
W=-10.6811 or W=4.68115
can't be negative width

width=4.68115 or -3√59

7 0

2 years ago

Find:

JulijaS [17]

Answer:

a) 15 ÷ 2/3=

=1 5 x 3/2=45/2

b) 3 × 1/8 × 6/9

=1/8 x 2( Simplify 3 with 9 remainder 3, reduce

6 with 3 remainder 2)

=1/4

c) 3 3/5 ÷ 2 2/5

=18/5 : 12/5

=18/5 . 5/12

=3/2

d) 2 1/12 × 1 1/5

= 25/12 . 6/5

=5/2

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

ASAP! I'll mark you as Branliest! Gina plotted the points (-3,4), (4,4), (-3,-2), and (4,-2), on the coordinate plane.

neonofarm [45]

Answer:

the reson why is becuase the length and width are equal

Step-by-step explanation:

8 0

2 years ago