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3 years ago

Tim bought five new baseball trading cards to add to his collection. The next

Mathematics

2 answers:

Nastasia [14]3 years ago

6 0

48 cards to start with

OLEGan [10]3 years ago

5 0

Answer:

43 cards i hope this helps! :)

Step-by-step explanation:

24 * 2 = 48

48 - 5 = 43

he had 43 to begin with. got the 5 to get 48. then his dog ate half 48 / 2 = 24

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The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past

galina1969 [7]

Complete Question

The complete question is shown on the uploaded image

Answer:

1 ) The correct option B

2) The correct option is C

3) The correct option is C

4) The correct option is C

Step-by-step explanation:

From the question we are told that

The proportion that own a cell phone is $p = 0.90$

The sample size is n = 15

Generally the appropriate distribution for X is mathematically represented as

$X \ is \ B( n , p )$

$X \ is \ B( 15 , 0.90 )$

Generally the number students that own a cell phone in a simple random sample of 15 students is mathematically represented as

$\mu = n * p$

$\mu = 15 * 0.90$

$\mu = 13.5$

Generally the standard deviation of the number of students who own a cell phone in a simple random sample of 15 students is mathematically represented as

$\sigma = \sqrt{ n * p * q }$

Where q is mathematically evaluated as

$q = 1- p$

$q = 1- 0.90$

$q = 0.10$

$\sigma = \sqrt{ 15 * 0.90 * 0.10 }$

$\sigma = 1.16$

Generally the probability that all students in a simple random sample of 15 students own a cell phone is mathematically represented as

$P(X = 15) = \left 15} \atop {}} \right.C_{15} * p^{15} * q^{15 - 15}$

$P(X = 15) = \left 15} \atop {}} \right.C_{15} * (0.90)^{15} * (0.10 )^{15 - 15}$

From the combination calculator is $\left 15} \atop {}} \right.C_{15} = 1$

$P(X = 15) = 1 * 0.205891 * 1$

$P(X = 15) = 0.206$

7 0

3 years ago

What is the y-intercept of the graph of y = 4^x-2?

mixas84 [53]

Answer: Hope this helps you.

-2

Step-by-step explanation:

y = mx+b (B is y-int)

y = 4^x-2

-2 is clearly replacing the b (y-int) meaning b, the y-int, is -2

5 0

2 years ago

Read 2 more answers

A music teacher asked 23 students in the band how many hours they practiced playing their

Katen [24]

you are correct. it is skewered left since there are more dots on the left side to the peak.

6 0

3 years ago

Lucy have $6400 if she invests<br> $1200 at 15% interest<br> compounded quarterly?

svet-max [94.6K]

Answer:

11.4 years

Step-by-step explanation:

We assume you want to know the time it takes for Lucy's investment of $1200 to have a value of $6400. The compound interest formula is good for finding that.

FV = P(1 +r/n)^(nt)

for principal P invested at rate r per year for t years, compounded n times per year. We want to find t such that ...

6400 = 1200(1 +0.15/4)^(4t)

16/3 = 1.0375^(4t) . . . . divide by 1200

log(16/3) = 4t·log(1.0375) . . . . take logarithms

t = log(16/3)/(4·log(1.0375)) ≈ 11.4

It will take about 11.4 years for Lucy's investment value to be $6400.

8 0

3 years ago

40 POINTS!!!! ANSWER CORRECTLY PLZ

Grace [21]

Answer: