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rosijanka [135]
3 years ago
8

What is the estimate of 19.7-6.9

Mathematics
1 answer:
Zolol [24]3 years ago
5 0
Always to do each to 1 sigfig 20-6=14
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Find the total mass of the triangular region shown below. All lengths are in cm, and the density of the region is sigma(x) = 1 +
anastassius [24]

Answer:

3 grams

Step-by-step explanation:

We are going to take the mass of a bunch of little strips below the triangle "roof." To do this, we must figure out what formula for the mass we'll use, in this case, we'll use:

Mass of strip = denisty * area = (1+x)*y*deltax grams

now, because the "roof" of the triangle contains two different integrals (it completely changes direction), we will use TWO integrals!

**pretend ∈ is the sum symbol

Mass of left part = lim x->0 ∈ (1+x)*y*deltax = inegral -1 to 0 of (1+x)*3*(x+1) = 3 * integral -1 to 0 of (x^2 + 2x + 1) = 3 *  1/3 = 1

Mass of left part = lim x->0 ∈ (1+x)*y*deltax = inegral 0 to 1 of (1+x)*3*(-x+1) = 3 * integral 0 to 1 of (-x^2 + 1) = 3 * 2/3 = 2

Total mass = mass left + mass right = 1 + 2 = 3 grams

8 0
3 years ago
Help? With this question please
Pie
A. original stuff is for 6 ppl anf u need for 2. and since 2 is 3x less yhan six. divide the ingrefiants by 3.

b. for 15 ppl, 6 is default. dou le all ingtediants is for 12. thrn add 50% more. aka mulyiply all ingrediants by 2.5
6 0
3 years ago
Read 2 more answers
If Jose's present age is 3n, how old will he be in 5 years?
KatRina [158]

Answer:

3n + 5

Step-by-step explanation:

You can't add 5 to 3n. So in 5 years he will 3n + 5.

7 0
3 years ago
Help please it due at 8
umka2103 [35]
I need help my self lol XD sorryyyyyyyyy88898
8 0
2 years ago
Find the slope and the y-intercept of the line in the graph.​
Radda [10]

The slope is 2. The y-intercept is 4.

Explanation:

The line constantly goes up to units for every unit that it goes to the right. The y intercept is 4 because it is 4 on the y-axis when x is 0.

8 0
3 years ago
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