The admission fee at an amusement park is $1.50 for children and $4 for adults. On a certain day, 336 people entered the park, and the admission fees collected totaled 854.00 dollars. How many
children and how many adults were admitted?

There were 108 children and 175 adults.

System of equations:

1.5x + 4y = 862
x + y = 283

Let's use substitution of the x variable to solve the system.

x + y = 283 <--- subtract x from both sides

y = 283 - x

Substitute y = 283 - x into the first equation.

1.5x + 4 (283 - x) = 862 <--- distribute 4 to 283 and -x

1.5x + 1132 - 4x = 862 <--- combine 1.5x and -4x

1132 - 2.5x = 862 <--- subtract 1132 from both sides

-2.5x = -270 <--- divide both sides by -2.5

x = 108

Substitute x =108 back into y = 283 - x

y = 283 - 108 = 175

There were 108 children and 175 adults.

If you are talking about typical sand you would find at the beach or in a river bed here on earth, there are some differences. i would say the first biggest difference is in composition and mineral make up. although the moon is largely made of the same materials as earth’s mantle and surface, the moon experiences very little weathering (no liquid water and virtually no atmosphere). “earth” sand is typically composed mostly of quartz grains. this is because quartz is highly resistant to both physical and chemical weathering. most of the other minerals originally with the quartz are broken down into fine clay and carried away, chemically eroded/ dissolved, or some combination of the two. this usually leaves only the quartz behind, and so most of the time when you see/think of sand, you are talking about quartz. without these weathering mechanisms on the moon, the “sand” (which is likely more silt or clay sized grains anyways) would consist of mostly other minerals like anorthosite, olivine, and proxene.

: )