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ehidna [41]
3 years ago
6

Helppppppppppp pleaseeee

Mathematics
1 answer:
NemiM [27]3 years ago
8 0
1. 60/1/5 =12 (purple)
2. The theoretical is 1/5 and in the experimental probability the spinner was spun 60 times and 1/5 of those were purple making the theoretical and experimental probability of purple the same
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What is 5(4x + 3.5) equivalent to?
sergejj [24]

Answer:

The answer is  

20x + 17.5

Step-by-step explanation:

Multiply the 5 by the numbers inside the parenthesis.

5 x 4x

5 x 3.5

3 0
2 years ago
Newton’s law of cooling states that the temperature of an object changes at a rate proportionalto the difference between the tem
Verizon [17]

Answer:

\frac{dT}{dt} = -0.05\;min^{-1}  (T-70\ºF)

Step-by-step explanation:

Hi!

Lets call:

T = temprature of the object

T₀ = temperature of surroundings

t = time

The rate of change of T is its derivative with respecto to time. If T > T₀, the object looses heat, so T decreases. Then, being k > 0:

\frac{dT}{dt} = -k(T-T_0) \\

In this case T₀ = 70ºF and k = 0.05/min. Then the differential equation is:

\frac{dT}{dt} = -0.05\;min^{-1}  (T-70\ºF)

3 0
3 years ago
Parker baked 80 cookies for a bake sale. At the bake sale, 70% of his cookies sold. How many of Parker’s cookies were sold?
Doss [256]

80 * 70 percent = cookies sold

80 * .7 = cookies sold

56 = cookies sold

4 0
3 years ago
Read 2 more answers
-8x = -96 <br> (a)-14 <br> (b) -13<br> (c)-12<br> (D) 12
Leto [7]

Answer:

D) 12

Step-by-step explanation:

divide each term by -8 and simplify

-8/-8x=-96/-8

x=12

7 0
2 years ago
Read 2 more answers
A dieter believes that the average number of calories in a homemade peanut better cookie is more than the average number of calo
zalisa [80]

The confidence interval formula is computed by:

Xbar ± Z s/ sqrt (n)

Where:

Xbar is the mean

Z is the z value

S is the standard deviation

N is the number of samples

 

So our given are:

90% confidence interval with a z value of 1.645

Sample size 40, 45

Mean 180, 179

Standard deviation 2, 4

 

So plugging that information in the data will give us a confidence interval:

For 1:

Xbar ± Z s/ sqrt (n)

= 180 ± 1.645 (2 / sqrt (40))

= 180 ± 1.645 (0.316227766)

= 180 ± 0.520194675

= 179.48, 180.52

For 2:

Xbar ± Z s/ sqrt (n)

= 179 ± 1.645 (4 / sqrt (45))

<span>= 179 ± 1.645 (0.596284794)</span>

therefore, the answer is letter b

8 0
3 years ago
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