Help please, hurry

An 18 in long rebar is driven into the ground until it touches an underground pipe. A backsight to a benchmark with an elevation

WARRIOR [948]

Answer:

398.71 ft

Step-by-step explanation:

Length of rebar = 18 inches = 1.5 ft

Elevation = 393.66 ft

Reading of backsight on Benchmark= 7.56 ft

Rod reading = 1.10 ft

First step : determine height of Instrument been used

= elevation + backsight on Benchmark

= 393.66 + 7.56 = 401.22 ft

Elevation of top of rebar

= 401.22 - 1.01 = 400.21 ft

Finally determine the elevation of the top of the pipe

= 400.21 - length of Bar

= 400.21 - 1.5 = 398.71 ft

6 0

3 years ago

On a workday the average decibel level of a busy street is 69 db, with 139 cars passing a given point every minute. if the numbe

Vlad1618 [11]

Decibel is directly proportional to number of cars passing the point. That is,

69 db ----- 139 cars
x db ----- 17 cars

x = number of cars passing the point per minute on a weekend.

Then,
x= (69*17)/139 = 8.43 db ≈ 8 db

8 0

4 years ago

A triangular prism and its dimensions are shown in the

Black_prince [1.1K]

1444jsjzjdjdjdjsnskzkzmmsm

8 0

3 years ago

If x is the number of odd integers between 10

Anastasy [175]

Answer:

C. 41

Step-by-step explanation:

We want to find the number of odd integers from 10 to 51.

The first odd integer from 10 to 51 is 11; the second is 13; the third is 15; and so on until 51. So, our list looks like this:

11, 13, 15, ... , 51

We need to figure out how many numbers there are. Let's add 1 to all of them:

11 + 1, 13 + 1, 15 + 1, ... 51 + 1

12, 14, 16, ... , 52

Now, let's divide by 2:

12/2, 14/2, 16/2, ... 52/2

6, 7, 8, ... , 26

Finally, subtract 5 from them:

6 - 5, 7 - 5, 8 - 5, ... , 26 - 5

1, 2, 3, ... , 21

There are 21 odd integers, so x = 21.

The even integers from 10 to 51 start with 12, 14. They end with 50. So, we have:

12, 14, ... 50

Let's use a similar method as above. Divide by 2:

12/2, 14/2, ... , 50/2

6, 7, ... , 25

Subtract 5:

6 - 5, 7 - 5, ... , 25 - 5

1, 2, 3, ... , 20

There are 20 even integers, so y = 20.

Then, x + y = 21 + 20 = 41.

The answer is thus C.

~ an aesthetics lover

8 0

3 years ago

Read 2 more answers

An airplane cuts through the morning sky for every 1,000 feet that he climbs the outside temperature drops 20° f what is the rat

Oliga [24]

Given :

An airplane cuts through the morning sky for every 1,000 feet that he climbs the outside temperature drops 20° F.

To Find :

The rate of the temperature change in degrees Fahrenheit per foot.

Solution :

Let, rate of the temperature change in degrees Fahrenheit per foot is x.

So,

$x = \dfrac{20}{1000}\ ^oF/foot\\\\x = 0.02 ^oF/foot$

Therefore, rate of the temperature change in degrees Fahrenheit per foot is 0.02.

Hence, this is the required solution.

4 0

4 years ago

Help please, hurry​

Help please, hurry