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3 years ago

A basic calculator costs four pounds. How much will sixty calculators cost?

Mathematics

2 answers:

Step2247 [10]3 years ago

7 0

60 calculators would weight 240 lbs

morpeh [17]3 years ago

6 0

60*4 = 240 pounds :)

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What is 43.043 in expanded form

nordsb [41]

40+3+.04+.003

expanded form is showing what you have to add together

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4 years ago

Can you help me with the bottom three please?

nika2105 [10]

Answer:

6= 66.67%

7=25%

8=70%

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3 years ago

Use the standard normal distribution or the t-distribution to construct a 99% confidence interval for the population mean. Jus

vichka [17]

Answer:

(25.732,30.868)

Step-by-step explanation:

Given that in a random sample of 42 people, the mean body mass index (BMI) was 28.3 and the standard deviation was 6.09.

Since only sample std deviation is known we can use only t distribution

Std error = $\frac{s}{\sqrt{n} } =\frac{6.09}{\sqrt{42} } \\=0.9397$

$df = 42-1 =41$

t critical for 99% two tailed $= 2.733$

Margin of error $= 2.733*0.9397=2.568$

Confidence interval lower bound = $28.3-2.568=25.732$

Upper bound = $28.3+2.568=30.868$

3 0

3 years ago

murzikaleks [220]

Answer:

Step-by-step explanation:

8 0

4 years ago

Given f (x) = 17 minus x squared, what is the average rate of change in f(x) over the interval [1, 5]?

PolarNik [594]

Answer:

The average rate of change of the function over the given interval is -6

Step-by-step explanation:

The function we want to find its average rate of change is;

F(x) = 17 - x^2

Mathematically, the average rate of change of a function F(x) over an interval (a,b) can be calculated as;

{F(b) - F(a)}/(b-a)

According to this question, a = 1 and b = 5

F(a) = F(1) = 17 -(1)^2 = 17 -1 = 16

F(b) = F(5) = 17 - 5^2 = 17-25 = -8

So making the substitution; we have

(-8)-16/(5-1) = -24/4 = -6

8 0

3 years ago

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