1. Mass of ramekin and cover (original) 2. Mass of ramekin and cover (after 1st heating) 3. Mass of ramekin, cover, and hydrated salt 4. Constant mass of ramekin and cover 5. Mass of hydrate (4-3) 6. Mass of ramekin, cover, and anhydrous salt (1st heating) 7. Mass of ramekin, cover, and anhydrous salt (2nd heating) 8. Constant mass of ramekin, cover, and anhydrous salt 9. Mass of anhydrous salt (8-4) 10. Mass of water lost (5-9)

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

1,645,493,059.35

step-by-step explanation:

1/3

step-by-step explanation:

to find this, you can divide 12 by 4 which is 3 or you can multiply 4 until you reach 12 (4x3=12). both should give you 3, meaning theres three times less bananas than there are oranges.