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Tanzania [10]
3 years ago
12

Malana makes kites she buys 2/3 yard of nylon and 7/9 block of balsa wood the nylon costs 6$ per yard the balsa wood costs $18 p

er block how much does Malana spend in all
Mathematics
1 answer:
fgiga [73]3 years ago
4 0

Answer:

$18

Step-by-step explanation:

2/3($6) = $4

7/9($18) = $14

total = $18

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The weekly amount spent by a small company for in-state travel has approximately a normal distribution with mean $1450 and stand
Llana [10]

Answer:

0.0903

Step-by-step explanation:

Given that :

The mean = 1450

The standard deviation = 220

sample mean = 1560

P(X > 1560) = P( Z > \dfrac{x - \mu}{\sigma})

P(X > 1560) = P(Z > \dfrac{1560 - 1450}{220})

P(X > 1560) = P(Z > \dfrac{110}{220})

P(X> 1560) = P(Z > 0.5)

P(X> 1560) = 1 - P(Z < 0.5)

From the z tables;

P(X> 1560) = 1 - 0.6915

P(X> 1560) = 0.3085

Let consider the given number of weeks = 52

Mean \mu_x = np = 52 × 0.3085 = 16.042

The standard deviation =  \sqrt {n \time p (1-p)}

The standard deviation = \sqrt {52 \times 0.3085 (1-0.3085)}

The standard deviation = 3.3306

Let Y be a random variable that proceeds in a binomial distribution, which denotes the number of weeks in a year that exceeds $1560.

Then;

Pr ( Y > 20) = P( z > 20)

Pr ( Y > 20) = P(Z > \dfrac{20.5 - 16.042}{3.3306})

Pr ( Y > 20) = P(Z >1 .338)

From z tables

P(Y > 20) \simeq 0.0903

7 0
3 years ago
What's the value of 6x to the second power +4x+8, when x=7
lidiya [134]
6(7)^2+4(7)+8=y
6(49)+28+8=y
294+28+8=y
330=y
7 0
3 years ago
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Kirsten has to walk 2 3/4km to school. How far has she walked when she halfway? Give your answer in metres.
evablogger [386]

Answer:

375 m

Step-by-step explanation:

\frac{3}{4}  \times 1000 = 750

From halfway

\frac{750}{2}  = 375

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6 0
2 years ago
What is the midpoint of the segment shown below ?
Ivanshal [37]

(1,-1) and (4,-6)

midpoint:

x = (1 + 4)/2 = 5/2

y = (-1 - 6)/2 = -7/2


Midpoint (5/2, -7/2)


Answer

D.

(5/2, -7/2)

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