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inessss [21]
3 years ago
7

What is 4,389 written in scientific notation?

Mathematics
1 answer:
Elena-2011 [213]3 years ago
7 0
4,389 = 4.389 x 10^3
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It has been hypothesized that allergies result from a lack of early childhood exposure to antigens. If this hypothesis were true
skad [1K]

Answer:

[a]. check attachment.

[b]. It can not be said that the difference is ascribed to chance as P-value = 0.001 which is less than <<0.05. That is  P-value = 0.001 <<0.05.

Step-by-step explanation:

Without mincing words let's dive straight into the solution to the question above.

[a]. The drawing showing the histogram of bacterial endotoxin levels is given in the attached picture.

KINDLY NOTE: The data is right-skewed.

[b].  ALLERGIC             MEAN        SE MEAN         STDEV           N

      FALSE                     1510             251                  1789            251

        TRUE                    530              109                 343               10

False - true = difference in a.

Hence, 80 = estimated difference.

For the difference, 95% CI = (434, 1527).

DF = 58, P-value = 0.001, and the T value = 3.59.

Therefore, It can not be said that the difference is ascribed to chance as P-value = 0.001 which is less than <<0.05. That is  P-value = 0.001 <<0.05.

4 0
3 years ago
On a stopwatch, the tip of the second hand moves 2 cm in 15 seconds. How long is the second hand (to the nearest tenth)?
Komok [63]
The 'seconds' hand on the watch goes all the way around in 1 minute. <span>15 seconds is 1/4 of a complete 1-minute revolution. </span>So, the 2 cm is 1/4 of the way around the circle that the tip makes. This makes the full circumference of the circle 8cm.

<span>The length of the second hand will be the radius of the circle. Use the following equation: </span>

2 pi radius  =  circumference

Since we know the circumference, plug that in, and solve for the radius:

2 pi radius  =  8 cm              
radius  =  8cm / 2 pi  =<span>  1.27 cm</span>
4 0
4 years ago
Read 2 more answers
65% of what number is 78?<br> A. 120<br> B. 143<br> C. 785<br> D. 5,070
RideAnS [48]

Answer:

D

Step-by-step explanation:

65% × 78 =

(65 ÷ 100) × 78 =

(65 × 78) ÷ 100 =

5,070 ÷ 100 =

50.7;

6 0
4 years ago
Read 2 more answers
On a piece of paper, graph y&lt; -*x+2. Then determine which answer choice matches the graph you drew.
alisha [4.7K]

D. graph D

Explanation

Step 1

graph the function as a line

convert

\begin{gathered} y

to graph, find 2 coordianates

a) when x=0

\begin{gathered} y=-\frac{3}{4}x+2 \\ y=-\frac{3}{4}\cdot0+2 \\ y=0+2,\text{ y=2} \\ so,\text{ we have P1(0,2)} \end{gathered}

b) when

x=-4

\begin{gathered} y=-\frac{3}{4}x+2 \\ y=-\frac{3}{4}\cdot-4+2 \\ y=3+2 \\ y=5 \\ P2(-4,5) \end{gathered}

now, using two points draw a line

Step 2

we are looking fro values under this line, so the answer is

D. graph D

7 0
1 year ago
Please help!!! If you can
kirill [66]

Answer:

Im guessing its B. Im sorry of this didnt help.

Step-by-step explanation:

4 0
3 years ago
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