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jek_recluse [69]
3 years ago
8

Kianna started her homework at 4:30 pm. She finished at 5:05 pm. How many SECONDS did it take her to finish her homework? *

Mathematics
2 answers:
lozanna [386]3 years ago
6 0

Answer:

2100 second

Step-by-step explanation:

4:30 pm to minutes

4 × 60 + 30 = 240 + 30

= 270 minutes

5:05 to minutes

5 × 60 + 5 = 300 + 5

= 305

4:30 to 5:05

305 - 270

= 35 minutes

35 minutes to second

35 × 60

= 2100 second

Veseljchak [2.6K]3 years ago
4 0

Answer:

2100

Step-by-step explanation:

25 minutes you need to know that 60 sec =1 hour.35x60=2100

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the width of a rectangle is 6inches less than twice it’s length. Find the dimension of the rectangle if it’s area is 108 square
Sindrei [870]

Answer:

Width = 12   Length = 9

Step-by-step explanation:

We have to first find an equations with the given variables:

w = 2L - 6

Now apply the area format:

Length * Width

Since the area is 108 square inches

108 = l * w

108 = l(2l-6)

108 = l(2l) + l(-6)

108 = 2l^2 - 6l

Simplify:

(l-9) * (l+6) = 0

Since no number can be negative

w = 2*9(L)-6

w = 12

l=9

5 0
2 years ago
Can someone help me?
12345 [234]
A= ab \frac{sin \theta}{2}
where A is area
a is side a lets say its 8cm
b is side b lets say its 7 cm
theta is 28
4 0
3 years ago
g Make a decision about the given claim. Use only the rare event​ rule, and make subjective estimates to determine whether event
vagabundo [1.1K]

Answer:

There is not sufficient evidence to support the claim.

Step-by-step explanation:

The claim to be tested is:

The mean respiration rate (in breaths per minute) of students in a large statistics class is less than 32.

To test this claim the hypothesis can be defined as follows:

<em>H₀</em>: The mean respiration rate of students is 32, i.e. <em>μ</em> = 32.

<em>Hₐ</em>: The mean respiration rate of students is less than 32, i.e. <em>μ</em> < 32.

The sample mean  respiration rate of students is 31.3.

According to the claim the sample mean is less than 32.

The sample mean value is not unusual if the claim is true, and the sample mean value is also not unusual if the claim is false.

Thus, there is not sufficient evidence to support the claim.

7 0
3 years ago
I need help please?!!!!!
ozzi

Answer:

8

Step-by-step explanation:

plug in the number 4, it would be 5•4-12

Do 5•4=20

20-12=8

7 0
2 years ago
What is the area of this figure???
pshichka [43]

Answer:

24 mm squared

Step-by-step explanation:

3 x 4 x 1/2 = area of the triangle

4 x 3 = area of the rectangular top left

1 x 6 = area of the bottom rectangle

3 x 4 = 12 x 1/2 = 6

4 x 3 = 12

6 x 1 = 6

6 + 12 + 6 =24

8 0
3 years ago
Read 2 more answers
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