Using a Calculator Appropriately and Strategically Quiz
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TIME REMAINING
52:04
Kevin bought 2 pairs of jeans that were originally $40
per pair but were each marked down by $15 and 31-
shirts for $12 each. He also used a coupon for sio off
his entire purchase. Which keys could be entered into
the calculator to determine the total amount he spent?
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2.40 - 15+ 3 * 12 - 10
2.25 +3.2
2.25 +3'12 - 10
02:40 - 12. 12 - 10
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d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2

where is the gragh

step-by-step explanation:

5.7622

step-by-step explanation:

the ten thousandths place is the 2. you round it up if, that number in whatever place is 5 or higher.