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4 years ago

What is the final amount if 893 is decreased by 2% followed by a further 7% decrease? Give your answer rounded to 2 DP.

Mathematics

1 answer:

Ber [7]4 years ago

8 0

Answer:

813.88

Step-by-step explanation:

893 × (1 - 2%) × (1 - 7%)

893 × 0.98 × 0.93

= 813.8802

Rounded to two decimal places will give 813.88.

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Can y’all help me me on question 2?! Have a good day!

AfilCa [17]

Answer:

Step-by-step explanation:

The formula to get the area of a triangle is A= $\frac{(b)(h)}{2}$ so all you have to do is work backwards. 18x2=36. 36/4=9.

6 0

3 years ago

Find equations of the spheres with center(1, −1, 6)that touch the following planes.a) xy-planeb) yz-planec) xz-plane

Misha Larkins [42]

Given :

Center of sphere , C( 1 , -1 , 6 ) .

To Find :

Find equations of the spheres with center (1, −1, 6) that touch the following planes.a) xy-plane b) yz-plane c) xz-plane .

Solution :

Distance of the point from xy-plane is :

d = 6 units .

So , equation of circle with center C and radius 6 units is :

$(x-1)^2+(y-(-1))^2+(z-6)^2=6^2\\\\(x-1)^2+(y+1)^2+(z-6)^2=36$

Distance of point from yz-plane is :

d = 1 unit .

So , equation of circle with center C and radius 1 units is :

$(x-1)^2+(x+1)^2+(z-6)^2=1^2\\\\(x-1)^2+(x+1)^2+(z-6)^2=1$

Distance of point from xz-plane is :

d = 1 unit .

So , equation of circle with center C and radius 1 units is :

$(x-1)^2+(x+1)^2+(z-6)^2=1^2\\\\(x-1)^2+(x+1)^2+(z-6)^2=1$

Hence , this is the required solution .

4 0

3 years ago

A student writes an incorrect step while checking if the sum of the measures of the two remote interior angles of triangle ABC b

iragen [17]

The student made the mistake in Step 2.

It should be m∠o + m∠p = 180 (Supplementary angles)

If this is corrected, then, since m∠m + m∠n + m∠o = 180 from Step 1,

we have,

m∠m + m∠n + m∠o = m∠o + m∠p which is Step 3.

Cancelling m∠o both sides, we get,

m∠m + m∠n = m∠p which is Step 4.

7 0

4 years ago

E. It costs $1.50 per hour to dry clothes at a laundromat. The rate per hour is $1.50 (slope) and the beginning point is 0 (y-in

klemol [59]

Answer:

y=1.5x

b is the y intercept but it is 0 so no need to add it. y is the result

5 0

2 years ago

Insert grouping symbols so that the given expression has a value of 34. 14 + 10 – 6 • 8 – 3

Naily [24]

The correct answer is D. 14 + (10 – 6) • (8 – 3).

That's because in each of the other answers, we are subtracting a greater and greater number. But in this version, we are first completing the parenthesis, which gives us the following.

14 + (10 – 6) • (8 – 3)

14 + (4) • (5)

Now we complete the multiplication.

14 + 20

And we end with the addition.

3 0

4 years ago