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Vlad [161]
3 years ago
12

Mark can clear a lot in 1.5 hours. His partner can do the same job in 3.5 hours. How long will it take them to clear the lot wor

king together?
Mathematics
2 answers:
IrinaK [193]3 years ago
8 0

Answer:

2.5 hours.

Step-by-step explanation:

This is the answer because you will need to add both of their times together then divide it by 2. You divide it by two because there are 2 people.

IRISSAK [1]3 years ago
3 0

Answer:

1.05 hours

Step-by-step explanation:

We need to use the least common multiple of 1.5 and 3.5 which is 10.5.

Thus we find how many lots each one will clear in 10.5 hours

Mart clears 1 lot in 1.5 hours

Number of Lots                 Time

           1                 ⇒           1.5 hours

so in 10.5 hous:

Number of Lots                 Time

           1                 ⇒           1.5 hours

           x                 ⇒           10.5 hours

the x is found by rule of three: multiply the cross quantities in the table (1 and 10.5) and dividing by the remaining amount (1.5):

x = 10.5*1/1.5

x = 7 lots

so Mark clears 7 lots in 10.5 hours.

His partner clears 1 lot in 3.5 hous:

Number of Lots                 Time

           1                 ⇒           3.5 hours

so in 10.5 hous:

Number of Lots                 Time

           1                 ⇒           3.5 hours

           x                 ⇒           10.5 hours

also by rule of three the x is:

x = 10.5*1/3.5

x = 3 lots

His partner clears 3 lots in the same 10.5 hours.

Thus, together:

Number of Lots                 Time

           7+3               ⇒        10.5 hours

simplifying:

Number of Lots                 Time

          10               ⇒        10.5 hours

and what we need to know is the time to clear one lot together:

Number of Lots                 Time

          10               ⇒        10.5 hours

          1                 ⇒        x

again, to find x we multiply cross quantities (10.5 by 1) and divide by the remaining amount (10):

x = 10.5*1/10

x = 1.05 hours

It will take them 1.05 hours to clear the lot

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Neal opened a savings account 11 years ago with a deposit of $2,335.69. The account has an interest rate of 4.3% compounded dail
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Answer: $1,412.52

Step-by-step explanation:

Formula to calculate the accumulated amount if <em>P</em> principal invested for <em>t </em>years at a rate of interest <em>r</em> that compounded daily is given by:-

A=P(1+\dfrac{r}{365})^{365t}

Given: P= $2,335.69

r= 4.3%= 0.043

t= 11 years

Then,

A=2335.69(1+\dfrac{0.043}{365})^{365\times11}\\\\=2335.69(1+0.000117808219178)^{4015}\\\\=2335.69(1.000117808219178)^{4015}\\\\= 2335.69(1.6047566747)\\\\=3748.09044309\approx3748.21\\\\\Rightarrow\ A=\$3748.21

Interest earned = A-P

= $3748.21- 2335.69.

= $1412.52

Hence, Neal earned $1,412.52 as interest.

8 0
3 years ago
If you place a 13-foot ladder against the top of a 12-foot building, how many feet will the bottom of the ladder be from the bot
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What is the missing angle for this or how do u do this pls add explanation!!!!!
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Step-by-step explanation:

3 0
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Two angles are complementary angles if the sum of their measure is 90 degrees. Angle A and angle B are complementary angles, and
Marta_Voda [28]
Let's solve this problem step-by-step.

STEP-BY-STEP SOLUTION:

We will be using simultaneous equations to solve this problem.

First we will establish the equations which we will be using as displayed below:

Equation No. 1 -

A + B = 90°

Equation No. 1 -

A = 2B + 12

To begin with, let's make ( A ) the subject in the first equation as displayed below:

Equation No. 1 -

A + B = 90

A = 90 - B

Next we will substitute the value of ( A ) from the first equation into the second equation and solve for ( B ) as displayed below:

Equation No. 2 -

A = 2B + 12

( 90 - B ) = 2B + 12

- B - 2B = 12 - 90

- 3B = - 78

B = - 78 / - 3

B = 26°

Then we will substitute the value of ( B ) from the second equation into the first equation to solve for ( A ) as displayed below:

A = 90 - B

A = 90 - ( 26 )

A = 64°

ANSWER:

Therefore, the answer is:

A = 64°

B = 26°

Please mark as brainliest if you found this helpful! :)
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