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ycow [4]
3 years ago
14

You leave a pile of sand in your backyard on a windy day. Every minute the wind blows away 10 percent of the remaining sand.You

started with five cubic feet of sand.What equation models the amount of sand after x minutes?
Mathematics
2 answers:
Leona [35]3 years ago
6 0

Answer:200cubic sand

Step-by-step explanation:

cubic means 3 times. And you lose 100 sand from wind 10 times.

Nookie1986 [14]3 years ago
6 0

Answer:

y=5 x .

90 to x power

Step-by-step explanation:

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58.(A) (5pts)A certain type of bacteria, given favorable growth medium, quadruples in population every 6 hours. Given that there
Jet001 [13]

Answer:

157286400 bacteria

Step-by-step explanation:

We are given the following in the question:

The bacteria increases 4 times every 6 hours.

Initially there are 150 bacteria.

Thus, we can write the function for number of bacteria after x hours,

f(x) = 150(4)^{\frac{x}{6}}

We have to find the number of bacteria in 2.5 days.

1 day = 24 hours

Thus,

2.5\text{ days} = 24\times 2.5 = 60\text{ hours}

Putting x = 60 in the above equation, we get,

f(60) = 150(4)^{\frac{60}{6}} = 150(4)^{10} = 157286400

Thus, there will be 157286400 bacteria in two and a half days.

5 0
4 years ago
Find the slope and y-intercept of each equation.<br> 8. y = - 0.7x -9
Varvara68 [4.7K]

Answer:

Slope: 0.7 Y-Intercept: 9.8

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Find the value of x.<br> 2x420<br> 3x+10
Elden [556K]

Answer:

2x+20+3x+10 = 180 (int. angles, parallel)

5x+30 = 180

5x=150

x=30

5 0
2 years ago
Solve by substitution (show steps) -3x-4y=10 -6x+y=-16
natali 33 [55]
1) -3x-4y=10 ==> - 3x = 10+4y  ===> 3x= -10-4y==> x=(-10-4y)/3
Now replace x by its value in 2)

2) -6x+y=-16 ==> - 6[( - 10- 4y)/3] + y = -16 ==> -2[(-10-4y] +y =- 16
+20+8y+y =- 16==> 9y = - 16 - 20 ==> 9y = -36 & y = - 4.

Now replace y by (- 4) in any of the 2 equations & you will find x = 2

6 0
4 years ago
What are the roots of a poloynomail equation? x^2+24=11x
IrinaVladis [17]
X=8,3 . i have to type more to submit the answer
3 0
4 years ago
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