2 years ago

7.) A bank records deposits as positive numbers

Mathematics

2 answers:

atroni [7]2 years ago

4 0

The answer would be -450. This is the answer because 150x3=450
Sonce we are withdrawing it would be -150x3=-450

Pavlova-9 [17]2 years ago

3 0

Depending on what his account balance was before the withdrawals the answer may vary.

The answer would be -450 though

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1436cm =?m how many meters

swat32

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3 years ago

Read 2 more answers

The wildlife department has been feeding a special food to rainbow trout fingerlings in a pond. based on a large number of obser

Liono4ka [1.6K]

The normal distribution curve for the problem is shown below

We need to standardise the value X=405.5 by using the formula

$z-score= \frac{X-Mean}{Standard Deviation}$
$z-score= \frac{405.5-402.7}{8.8} =0.32$

We now need to find the probability of z=0.32 by reading the z-table

Note that z-table would give the reading to the left of z-score, so if your aim is to work out the area to the right of a z-score, then you'd need to do:

$P(Z\ \textgreater \ z)=1 - P(Z\ \textless \ z)$

from the z-table, the reading $P(Z\ \textless \ 0.32)$ gives 0.6255

hence,
$P(Z\ \textgreater \ 0.32)=1-0.6255=0.3475$

The probability that the mean weight for a sample of 40 trout exceeds 405.5 gram is 0.3475 = 34.75%