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Elena-2011 [213]
3 years ago
15

a contractor digs a hole that is 40 ft long and 10.5 feet deep. what is the width of the hole if 6,510 cubic feet of dirt is rem

oved?​
Mathematics
1 answer:
ehidna [41]3 years ago
8 0

Jtdutcyiftutfutffgucug

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Elliot borrowed $3800 from the bank for 3 years at a 4.25% simple interest rate?
Ipatiy [6.2K]

$161.50

Step-by-step explanation:

4.25% of $3800 is $161.50

3 0
3 years ago
Pls answer question 6 and 7
ra1l [238]

Answer:

go to the website slader.com

Step-by-step explanation:

it has most textbooks on it and the answers to textbook questions

8 0
3 years ago
Can someone help. pls ​
Elan Coil [88]

Answer: 5

Step-by-step explanation:

Pythagorean Theorem = a^2 + b^2 = c^2 (hypotenuse)

the square root of 4^2 + 3^2 = c

c = 5

3 0
2 years ago
A geometric progression has a third term of 20 and a sum of infinity which is 3 times the first term. Find the first term ​
Anna007 [38]

Answer: the first term is 45

Step-by-step explanation:

Step 1: The formular for the nth term is ar^n-1 and since we're solving for the third term ar^3-1 = ar² which is equal to 20

So ar²= 20 and we make this equation i

Step 2: the formular for the sum of infinity is Sn = a/(1-r) and according the question the sum of infinity is equals to 3 *A ( A means the first term)

Further simplification gives us

3a= a/(1-r)

We simplify Futher by multiplying both sides by (1-r)

3a.(1-r) = a/(1-r).(1-r)

3a(1-r)=a

= 3a-3ar=a

Make 3ar the subject of the formula

3ar= 2a and lets make this equation (ii)

Step 3: From the first equation since ar²=20, let's make a the subject of the formula by dividing both sides by r²

Ar²/r² = 20/r²

A=20/r²lets make this equation (iii)

Step 4: subtitle a as 20/r² into equation (ii)

Since 3ar=2a

Then 3.(20/r²).r = 2. 20/r²

= (60/r²) .r = 40/r²

60/r = 40/r2

Multiplying both sides by r² gives us

60r = 40

Divide both sides by 20 gives us

= 3r= 2

Divide both sides by 3 gives us

= r = 2/3

Step 5: substitute r for 2/3 in equation i

ar²= 20

a. (2/3)2 = 20

= a.4/9 = 20

= 4a = 180

= a = 180/4

a = 45

5 0
3 years ago
Find the scale factor
RSB [31]

Answer:

3

Step-by-step explanation:

4*3=12

3*3=9

5*3=15

So you find the number that can be multiplied or divided by each side the same to get the new number

5 0
2 years ago
Read 2 more answers
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