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Dmitry_Shevchenko [17]
2 years ago
10

Express your answer in scientific notation. 0.00045-2.5x10^-5​

Mathematics
1 answer:
maw [93]2 years ago
8 0

Answer:

4.25 × 10^-4

Step-by-step explanation:

0.00045-2.5x10^-5

= (4.5 × 10^-4) - (0.25 × 10¹ × 10^-5)

= (4.5 × 10^-4) - (0.25 × 10^{1-5} )

= (4.5 × 10^-4) - (0.25 × 10^-4)

= (4.5 - 0.25) × 10^-4

= 4.25 × 10^-4

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Anna has a recipe for pumpkin bars. She uses 2 ½ cups of sugar for every 3 pans of pumpkin bars. AJ wants to follow the same rec
Kisachek [45]

Answer:

2.5h = 3g

Step-by-step explanation:

Given

Sugar = 2\frac{1}{2}\ cups

Bars = 3\ pans

Required

Determine the equation for h pans and g cups

We have that:

Sugar = g

Bars = h

To do this, we make use of the following equivalent ratios.

Bars : Sugar = Bars : Sugar

So, we have:

3 : 2\frac{1}{2} = h : g

Express fraction as decimal

3 : 2.5 = h : g

Express as fraction

\frac{3}{2.5} = \frac{h}{g}

Cross multiply

2.5h = 3g

No options were given. So, I will stop here

8 0
3 years ago
Aging workers of the Neotropical termite, Neocapritermes taracua, develop blue crystal containing glands ("backpacks") on their
Kaylis [27]

Answer:

The blue liquid is toxic

Step-by-step explanation:

From the calculations I have done and attached to this problem

Null hypothesis:

H0 : p1 <= p2

Alternate hypothesis:

H1 : p1 > p2

^p1 = 0.925

^p2 = 0.2250

^P = (x1 + x2)/(n1+n2)

= 0.575

After calculating, I got test statistics = 6.33 ( check attachment)

P(z > 6.33) = 0.0000

In conclusion, our pvalue has been found to be less than the level of significance 0.05 so we reject null hypothesis and accept that we have enough sample evidence that the blue liquid is more toxic in comparison to white one.

Please check attachment for calculated test statistics.

7 0
4 years ago
Jenny has 63 grapes to put in a fruit salad but she only wants to add 40% of them to the Bowl how many grapes does she use for t
crimeas [40]
You multiply 63  by .40
You get 25.2, so 25 grapes
7 0
3 years ago
Read 2 more answers
Solve for g 3g-10=-45​
Goryan [66]

Answer:

g = -18.3

Step-by-step explanation:

3g-10=-45

+10 (Cancel out the 10)

3g=-55

/3 (Divide by 3 to cancel out the 3)

g= -18.3

5 0
3 years ago
Read 2 more answers
Solve the equation.<br><br> 42x – 5 = 64
aliina [53]

Answer:

23/14

Step-by-step explanation:

42x - 5 = 64

Add 5 to both sides in order to isolate 42x

42x = 64 + 5

42x = 69

Divide 42 from both sides in order to isolate x

x = 69/42

The answer gives an uneven decimal so it'd be best to leave it as a simplified fraction. The simplified fraction is 23/14.

7 0
4 years ago
Read 2 more answers
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