Solve the Problem. -Estimate the Answer by Rounding Each Number to the Nearest

question 37

Multiple Choice

Solve the problem.
-Estimate the answer by rounding each number to the nearest hundred.
871 - 224

• A) 600
• B) 1100
• C) 700
• D) 647

---

Definitions:

Iron Formations

Geological formations composed of layered sediments and minerals, predominantly iron-rich, that were deposited in ancient oceanic and lake environments.

Sedimentary Sequences

Layers of sedimentary rocks that record the geological history of an area, often showing a progression of depositional environments.

Groundwater

Water that is found in the pores and fractures in rock and soil beneath the Earth's surface, which can supply wells and springs.

Porphyry Copper Deposits

Large, low-grade mineral deposits containing dispersed copper-bearing minerals in a porphyritic host rock, often associated with intrusive igneous rocks.