Can I please have some help on this?!

15 cm

Step-by-step explanation:

Area of the triangle = 1/2bh = 1/2×18×10 = 90cm²

Area of parallelogram = 3 × Area of triangle = 3 × 90 = 270cm²

Area of parallelogram = base × height

270cm² = b × 18

b = 270/18

b = 15 cm

answer: 1722

step-by-step explanation:

given: the mass of saturn=

the mass of mercury=

the number of times the mass of saturn is greater than the mass of mercury

hence, the mass of saturn is 1722 times greater than the mass of mercury.

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!