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Morgarella [4.7K]
3 years ago
13

Convert 0.00049 to scientific notation.

Mathematics
1 answer:
Step2247 [10]3 years ago
6 0
4.9 x 10 to the power of -4 
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What is the mean of the values in the dot plot?
never [62]

Answer:

Mean=19.5

Step-by-step explanation:

Mean= (16x1 + 17x4 + 19x4 + 21x1 + 22x2 + 23x1 + 25x1)/14=273/14=19.5

7 0
3 years ago
The length of a rectangular storage room is 3 feet longer than its width. if the area of the room is 40 square feet, find the wi
xenn [34]

Answer:

Width of rectangular storage room= 5 feet.

Step-by-step explanation:

Let x be the width of storage room.

We have been given that the length of a rectangular storage room is 3 feet longer than its width. So the length of storage room will be x+3.

We are also given that the area of the room is 40 square feet.

Since the area of a rectangle is length times width.

\text{Area of rectangle}=\text{Length* Width}

Let us substitute our given values in area formula.

40=x*(x+3)

Upon distributing x we will get,

40=x^2+3x

x^2+3x-40=0

Now let us factor out our quadratic equation using splitting the middle term.

x^2+8x-5x-40=0

x(x+8)-5(x+8)=0

(x+8)(x-5)=0

x+8=0 or x-5=0

x=-8 or x=5

Since width can not be negative, therefore, the width of rectangle will be 5 feet.

Let us verify our answer.

Length of rectangular storage room is 3 feet longer than its width. So length will be 5+3=8.

Given: Area=40 square feet.

5*8=40.

Hence, width of rectangular storage room is 5 feet.

7 0
3 years ago
Veronica has been saving dimes and quarters. She has 94 coins in all and the total value is $19.30. How many dimes and how many
Stolb23 [73]

Answer:

Step-by-step explanation:

d + q = 94.....d = 94 - q

0.10d + 0.25q = 19.30

0.10(94 - q) + 0.25q = 19.30

9.4 - 0.10q + 0.25q = 19.30

-0.10q + 0.25q = 19.30 - 9.40

0.15q = 9.90

q = 9.90/0.15

q = 66 <===== there are 66 quarters

d + q = 94

d + 66 = 94

d = 94 - 66

d = 28 <==== there are 28 dimes

3 0
3 years ago
Help asap pls i’ll appreciate it a lot !!
WARRIOR [948]

Answer:

A. 7.5 cm

Step-by-step explanation:

3/4 = (x + 3)/(2x + 1)

3(2x + 1) = 4(x + 3)

6x + 3 = 4x + 12

2x = 9

x = 4.5

BC = x + 3

= 4.5 + 3

= 7.5 cm

6 0
4 years ago
Count by 1/4s from 2 1/2 to 6 1/2
Bingel [31]

Answer:

there are 16 1/4s

Step-by-step explanation:

1 = 1/4 x 4

2 1/2 + 4 = 6 1/2

4 = 1/4 x 16

7 0
4 years ago
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