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g100num [7]
2 years ago
15

3. Bobbi bought 4 rolls of

Mathematics
1 answer:
sveta [45]2 years ago
3 0

Answer:

400 x however long those ribbons are

Step-by-step explanation:

1 meter is 100 centimeters, and there are four rolls. so 4x100 equals 400, and you multiply that by the length that you didn't provide.

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Ribbon candy costs $2.50 per foot.How many feet ca you buy if you have $11.25
Vikentia [17]

Answer:

4.5 ft

Step-by-step explanation:

11.25/2.5=4.5 so you can buy 4.5 feet

hope this helps

3 0
3 years ago
*Will give brainliest. $1,500 is invested into an account with an interest rate of 6.75%. How many years will it take for the ac
algol [13]
The formula of a continuous compound interest is
A=p e^rt
A future value 7300
P present value 1500
E constant
R interest rate 0.0675
T time?
Solve the formula for t
T=[log (A/p)÷log (e)]÷r
T=(log(7,300÷1,500)÷log(e))÷0.0675
T=23 years
7 0
3 years ago
What is -27 x -48??????
marissa [1.9K]

the answer for this is 1296.

5 0
3 years ago
Read 2 more answers
I really need help with questions 12, if you would like it would be really helpful if you can explain how you got the answer as
AURORKA [14]

Answer: 160 pieces

Step-by-step explanation:

1. Convert each mixed number into an improper fraction

4 4/5 = 24/5

2. Convert to the least common denominator. In this case, the least common denominator would be 10. Since the denominator in 24/5 is 5, multiply this fraction by 2/2 to get the denominator to equal 10.

24/5 * 2/2 = 48/10

3. Divide 48/10 by 3/10, using the keep, change, flip method

48/10 * 10/3

Multiply the numerators and denominators together, respectively.

480/3

4. Simplify

480/3 = 160

There are 160 pieces.

8 0
3 years ago
Read 2 more answers
A new drug to treat psoriasis has been developed and is in clinical testing. Assume that those individuals given the drug are ex
cricket20 [7]

Answer:

Step-by-step explanation:

Solution:-

State the hypotheses. The first step is to state the null hypothesis and an alternative hypothesis.

Null hypothesis: The distribution of severity of psoriasis cases at the end and prior are same.

Alternative hypothesis: The distribution of severity of psoriasis cases at the end and prior are different.

Formulate an analysis plan. For this analysis, the significance level is 0.05. Using sample data, we will conduct a chi-square goodness of fit test of the null hypothesis.

Analyze sample data. Applying the chi-square goodness of fit test to sample data, we compute the degrees of freedom, the expected frequency counts, and the chi-square test statistic. Based on the chi-square statistic and the degrees of freedom, we determine the P-value.

DF = k - 1 = 4 - 1

D.F = 3

(Ei) = n * pi

Category            observed Num      expected num      [(Or,c -Er,c)²/Er,c]

Remission             380                         20                           6480

Mild

symptoms               520                         770                       81.16883117

Moderate

symptoms                 95                         160                         24.40625

Severe

symptom                  5                             50                          40.5

Sum                          1000                       1000                       6628.075081

Χ2 = Σ [ (Oi - Ei)2 / Ei ]

Χ2 = 6628.08

Χ2Critical = 7.81

where DF is the degrees of freedom, k is the number of levels of the categorical variable, n is the number of observations in the sample, Ei is the expected frequency count for level i, Oi is the observed frequency count for level i, and Χ2 is the chi-square test statistic.

The P-value is the probability that a chi-square statistic having 3 degrees of freedom is more extreme than 6628.08.

We use the Chi-Square Distribution Calculator to find P(Χ2 > 19.58) =less than 0.000001

Interpret results. Since the P-value (almost 0) is less than the significance level (0.05), we cannot accept the null hypothesis.

We reject H0, because 6628.08 is greater than 7.81. We have statistically significant evidence at alpha equals to 0.05 level to show that distribution of severity of psoriasis cases at the end of the clinical trial for the sample is different from the distribution of the severity of psoriasis cases prior to the administration of the drug suggesting the drug is effective.

5 0
3 years ago
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