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Viefleur [7K]
3 years ago
12

Scientific notation for 78 million

Mathematics
2 answers:
Sauron [17]3 years ago
8 0

Answer:

78 million in scientific notation is 7.8 x .

Step-by-step explanation:

snow_lady [41]3 years ago
7 0
7.8 x 10 to the power of 10

Hope it helps!
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what is the y-intercept of the function, represented by the table of values below x= -2,1,2,4,7 y=15,6,3,-3,-12
Natali5045456 [20]

Answer: The y-intercept would be 10

Step-by-step explanation:

(-2, 15), (1, 6), (2, 3), (4, -3), (7, -12) are the coordinate points, you can graph it to find the intercept. I used the graphing calculator desmos.

4 0
3 years ago
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 In a survey of 2,200 people who owned a certain type of​ car, 1,210 said they would buy that type of car again. What percent of
katrin [286]

Answer:

55%

If 1,210 people would buy that type of car again, they were satisfied with it.

The fraction of people who were satisfied would be \frac{1210}{2200}.

To find a percentage, we need to divide the top of the fraction by the bottom, then multiply by 100.

1210/2200 is equal to 0.55. This is the decimal form of the fraction, but we need the percentage.

0.55 x 100 is equal to 55.

The answer is 55%

6 0
3 years ago
The wolfpack has one 11 games and lost 9 games this season. what percent of its games did the wolfpack win?
Murrr4er [49]
In fractions they had won 11/20 games. Then if you convert the fraction to a percent you would get 55% after multipling by 5/5 to get the denominator of 100.

The answer would be 55%.
4 0
3 years ago
Find the percent of each type of sandwich sold.
elena55 [62]

Answer: 50% of the sandwiches were turkey, 30% were veggie and 20% were tuna.

Step-by-step explanation: The total number of sandwiches sold was 50 in all.

The sales according to type of sandwich were as follows;

25 Turkey

15 Veggie

10 Tuna

50 Total

Since there were 50 sandwiches sold and of these 25 were turkey sandwiches and another 15 were veggie sandwiches, then the remaining which is tuna sandwich is derived as 50 - [25 + 15] which equals 10.

To calculate the percentage per type of sandwich sold;

(a) Turkey is derived as

Percentage turkey = (25/50) x 100

Percentage turkey = 1/2 x 100

Percentage turkey = 50%

(b) Veggie is derived as

Percentage Veggie = (15/50) x 100

Percentage Veggie =  (3/10) x 100

Percentage Veggie = 30%

(c) Percentage tuna = (10/50) x 100

Percentage tuna = 1/5 x 100

Percentage tuna = 20%

5 0
3 years ago
A market research firm supplies manufacturers with estimates of the retail sales of their products from samples of retail stores
EastWind [94]

Answer:

(52-49) -4.300= -1.300

(52-49) +4.300= 7.300

And the 95% confidence would be :

-1.300 \leq \mu_1 -\mu_2 \leq 7.300

Step-by-step explanation:

We have the following info given from the problem

\bar X_1 = 52 sample mean for this year

s_1= 13 sample deviation for this year

n_1 = 75 random sample selected for this year

\bar X_2 = 49 sample mean for last year

s_2= 11 sample deviation for last year

n_1 = 53 random sample selected for last year

And we want to construct a 95% confidence interval estimate of the difference μ1−μ2, where μ1 is the mean of this year's sales and μ2 is the mean of last year's sales

For this case the formula that we need to use is:

(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}

The degrees of freedom are given by:

df= n_1 +n_2 -2 = 75+53-2= 126

The confidence level is 0.95 and the significance would be \alpha=0.05 and \alpha/2 =0.025 so then the critical value for this case is :

t_{\alpha/2}= 1.979

The margin of error would be:

ME = 1.979 \sqrt{\frac{13^2}{75} +\frac{11^2}{49}}= 4.300

And the confidence interval would be given by:

(52-49) -4.300= -1.300

(52-49) +4.300= 7.300

And the 95% confidence would be :

-1.300 \leq \mu_1 -\mu_2 \leq 7.300

6 0
3 years ago
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