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3 years ago

HELP ME PLEASE I DONT UNDERSTAND THIS !!!

Mathematics

1 answer:

ioda3 years ago

6 0

The car is speeding at a rate of 33.3mph

<h3>Speed and distance of an object</h3>

If a certain car going 60 mph can stop in 180 ft, then we can express this as:

60mph = 180ft

To determine the speed for a car traveling at 100ft, we will have:

x = 100ft

Take the ratio of the expression

60/x = 180/100
180x = 6000

x = 33.3mph

Hence the car is speeding at a rate of 33.3mph

learn more on speed here: brainly.com/question/4931057

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The weights of a certain dog breed are approximately normally distributed with a mean of μ = 55 pounds, and a standard deviation

weqwewe [10]

Answer:

(a)z=-1

(b)48.5 pounds

Step-by-step explanation:

$z-score=\dfrac{x-\mu}{\sigma}$

Given:

Mean, μ = 55 pounds

Standard deviation,σ = 6 pounds.

(a)For a dog that weighs 49 pounds.

x=49 pounds

The z-score

$=\dfrac{49-55}{6}\\=\dfrac{-6}{6}\\\\=-1$

(b)When a dog has a z-score of -1.09

$-1.09=\dfrac{x-55}{6}\\x-55=-6.54\\x=55-6.54\\x=48.46 \approx 48.5$ pounds (to the nearest tenth)$

The weight of a dog with a z-score of -1.09 is 48.5 pounds.

(c)When a dog has a z-score of 1.09

$1.09=\dfrac{x-55}{6}\\x-55=6.54\\x=55+6.54\\x=61.54 \approx 61.5$ pounds (to the nearest tenth)$

The weight of a dog with a z-score of 1.09 is 61.5 pounds.

3 0

3 years ago

200m - 100m + 48,250 = 50,250 - 150m

Ede4ka [16]

Answer:

m=8

Step-by-step explanation:

5 0

3 years ago

How many gallons of water will this fish tank hold?<br> 15 in deep<br> 30 in wide <br> 12 in long

Umnica [9.8K]

Answer:

5400 gallons

Step-by-step explanation:

6 0

3 years ago

The sum of a number and 16 times it's reciprocal is 10. Find the numbers

NARA [144]

Answer:

The answer is 2 and 8!

Hope this helped :D

6 0

3 years ago

Desmond has $90,000 in a savings account. The interest rate is 8 % per year and is not compounded. How much will he have in 3 ye

BigorU [14]

Answer:

$111,600

Step-by-step explanation:

8% of $90,000 is $7,200

$7,200 x 3 = $21,600

90,000 + 21,600 = $111,600

5 0

3 years ago