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worty [1.4K]
4 years ago
15

Daniel bought a pokemon card at a store for $10. He sold the card for $20.

Mathematics
1 answer:
ss7ja [257]4 years ago
6 0

Answer:

Daniel gained 30 dollars.

Step-by-step explanation:

-10 + 20 = 10

10 - 30 = -20

-20 + 50 = 30

Hope this helps :)

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A botanist measured the length of a tomato seedling as 3.56 centimeters. Select her degree of accuracy in measurement.
xxTIMURxx [149]

Answer:

her degree of accuracy in measurement is 0.05 cm (Option D)

Step-by-step explanation:

The degree of accuracy in the measurement of the botanist depends on the instrument used.

For a length of 3.56 centimeters, it shows that the length of the tomato seedling was measured using meter rule or tape.

Meter rule is graduated in 1 mm or 0.1 cm. The estimated uncertainty in measurement using meter rule is half of its graduation i.e ( ¹/₂ of 0.1 cm = 0.05 cm).

If the botanist measured the length of tomato seedling as 3.56 centimeters, then her degree of accuracy in measurement is 3.56 cm ± 0.05 cm.

Therefore, her degree of accuracy in measurement is 0.05 cm (Option D)

4 0
3 years ago
Classify the triangle shown below. Check all that apply.
Alex777 [14]

Answer:

It's actually right and scalene

Step-by-step explanation:

Since there is a ninety degree angle, it isn't obtuse or acute because the angle is a right angle. And since all the side lengths are different, it must be scalene in comparison to isoceles or equilateral.

3 0
3 years ago
Read 2 more answers
If a famer plows 2 acres every 3 hours how long will it take to plow 60 acres
Elina [12.6K]

it take him 90 hrs to plow 60 acres


4 0
3 years ago
Meredith was paid $18 for recycling 30 pounds glass. What is this rate payment
hammer [34]

$1.67 for each pound of glass

3 0
3 years ago
A musical instrument has a pitch of 220 hertz when the wavelength is 3 feet. When the wavelength is 4 feet, the pitch is 165 her
earnstyle [38]
We know that
Inverse Variation is a<span> relationship between two variables in which the product is a constant
so
let
x------> a pitch of a musical instrument
y------> </span><span>the wavelength
x*y=k

find the value of k

for x=</span><span>220 hertz   y=3 ft
</span><span>x*y=k
220*3=k
k=660

</span>for x=165 hertz   y=4 ft
x*y=k
165*4=660
k=660<span>

the answer part a) is
</span><span>the type of variation between pitch and wavelength is an inverse variation
</span>
part b) <span>What is the pitch when the wavelength is 5 feet?
x=?
y=5 ft
k=660
x*y=k------> solve for x
x=k/y----------> x=660/5-----> x=132 hertz

the answer Part b) is
132 hertz</span>
4 0
3 years ago
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