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lawyer [7]
3 years ago
8

A smart phone manufacturer wants to determine the average battery time that it’s new smart phone will get. The manufacturer will

test 100 smart phones. Match the strategy to their corresponding sampling techniques
Mathematics
1 answer:
sasho [114]3 years ago
7 0

Answer:

Note: <em>The full question is attached as picture below</em>

<em />

1. The manufacturer is taking a sample of her friends, which is most convenient to sample - Convenience sampling

2. The whole population is divided into different groups (strata) and random samples are drawn from each group - Stratified sampling

3. The population is divided into different clusters (here, communities) and whole clusters are surveyed - Cluster sampling

4. The samples are drawn at a fixed interval from the population list - Systematic sampling

5. The samples are randomly drawn from the population - Simple random sampling

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Step-by-step explanation:

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Step-by-step explanation:

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When multiplied, what is the simplified form of (5 − 2i)(1 − 2i)? Write the answer in standard form, a + bi, where a and b are r
jeka57 [31]
(5 - 2i)(1 - 2i) You can solve this as though it was (x - 2)(x + 3): use foil

F: 5*1 = 5
O: 5 *(-2i) = - 10i
I : -2i * (1) = - 2i
L: (-2i)(-2i) This may take a bit. There's a few signs hanging around.
L: (-2 * -2)*(i * i)
L: 4 (i *i)
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L: - 4 So combine these results.

FOIL: 5 - 10i - 2i - 4 Group the like terms
FOIL: 5 - 4 - 10i - 2i Now collect them
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7 0
3 years ago
Solve by factorising<br> x? + 8x + 15 = 0
vodka [1.7K]

Answer:

x=-15/8 or -1 7/15 OR x=-5/3 or -1 2/3

Step-by-step explanation:

Subtract 15 from both sides

8x=-15

Divide 8 on both sides

Now you get your answer

x=-15/8 or -1 7/15

OR

Combine like terms

9x+15=0

Subtract 15 from both sides

9x=-15

Divide 9 from both sides

x=-15/9

Simplify

x=-5/3 or -1 2/3

5 0
2 years ago
Jo Ann white is paid a salary of 410$ a week of a commission of 5.6% of all sales how much does she earn a week
irina1246 [14]
1) 410 * .056 =22.96
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8 0
3 years ago
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