Because of the high heat and low humidity in the summer in Death Valley, California, a visitor requires about one quart of water for every two miles traveled on foot. If the density of water is 0.990 g/mL at 45°C, how many kilograms of water are required for a person to walk 30 kilometers in Death Valley?

The answer to your question is   mass = 8.73 kg

Step-by-step explanation:

Data

1 quart 2 mi

density = 0.99 g/ml

total distance = 30 km

Process

1.- Convert 2 mi to km

                  1 mi 1.61 km

                  2 mi  x

                  x = (2 x 1.61)/1

                  x = 3.22 km

2.- Calculate the quarts drank

                   1 quart 3.22 km

                   x           30 km

                   x = (30 x 1)/3.22

                   x = 9.32 quarts

3.- Convert quarts to milliliters

                   1 quart 946.35 ml

                 9.32 quart x

                  x = (9.32 x 946.35) / 1

                  x = 8817 ml

4.- Calculate the grams of water

     density = mass / volume

     mass = volume x density

-Substitution

     mass = 8817 x 0.99 g/ml

-Result

     mass = 8729 g

5.- Convert to kg

     mass = 8729/1000 kg

     mass = 8.73 kg

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

too many. (jk)

31 v bucks

step-by-step explanation:

since you bought 25 on friday and 6 on tuesday, you can just add them up.

25+6=31

check your work.

31-6=25

i hope this !

-yand3r3